Different Sex Story

by richman3©

I am a huge fan of the mom riding on son's lap theme. This is simply my take on it.

All credit to the ones that have come before me. Simply call this a tribute to them if you will.

I would also like to thank a few people that helped me with this story:

Todger65

(waaaahh me too... that's why I re-open this account to copy paste..

-coppykatttoooooooo)

*****

Haulover

And one other who, at their request, shall remain nameless (but you know who you are).

This is my first story here, and I couldn't have done it without all of you so thanks.

(This is an edited version of the original story)

* * * * *

"Hey, watch it," my dad said as I accidently bumped him with a box of my clothes.

We were loading his Jeep Cherokee with everything in the world that I owned. All of my stuff from my failed stay in California with my aunt and uncle.

A couple of months ago, I had moved out here using a rented U-Haul with the few bucks I had saved from mowing lawns during the summer.

The plan was for me to stay here and commute to USC to study biology. Unfortunately, that plan had failed completely.

Two weeks ago, my uncle got severely injured on his job. They had to move specialized equipment into the house and no longer had any room for me.

The doctor bills were going to be high, and they couldn't afford for me to stay there now.

I didn't have the money to live on campus, which put my dreams of attending USC on hold.

Our current plan was for me to move back home and try to find a community college so I could at least complete my basic courses, and then save enough to try again in a few years.

Needless to say, I was disappointed. So being careful with my boxes of stuff wasn't exactly on top of my mind.

"Don't listen to your father, honey. He just hates doing anything that doesn't involve watching football and drinking beer." She gave him a sour look.

My dad was a big guy - almost 300 pounds. He had played college football, and if it wasn't for a knee injury, he might have had a shot at going pro.

Over the years, though, a lot of that muscle had turned to fat. Even so, he was still strong and was an imposing figure to most people.

"I know, Mom. This just sucks, that's all."

"Don't worry, sweetie, we'll make this work and figure things out."

She gave me hug, and as she did, I couldn't help but notice the difference between her and my father.

She had never let herself go, and, even though she was nearing 40, her body was as tight as a 20-year-old.

Pilates and yoga kept her body firm, and her natural C's felt as firm as ever against my chest as she hugged me.

"Stop it," I thought. "She is your mom." I shook those thoughts from my mind.

"What's wrong?" she asked.

"Nothing. Just thinking about this whole situation. It's not going to work with all of this stuff in the Jeep."

"Your father will figure something out."

Well, he didn't, and it wasn't his fault either - there simply wasn't enough room for the three of us and all of my stuff.

We tried moving things around, but it was no use.

The only place my television would fit was in the front seat half in the foot well and a half on the seat.

We were worried it might get damaged in the back with all of my other stuff. So the three of us were down to basically 2 seats and a small space next to the boxes piled on the back seat.

"There's no way I'm going to fit in the back with one of you," my dad said. He was right of course, and that left us with no other option but for me and mom to squeeze into the back together.

Though not as big as my dad, at 6'1" and 205 pounds I wasn't exactly small either. My mom being just 5'1" and about 100 pounds made it easier, but it was still going to be a tight fit no matter what.

"Okay," she said, "we'll make do back here." Mom shot my dad another dirty look.

I didn't know, but something must've happened in the two months that I was away. I knew they weren't as close as they used to be, but this was new.

Mom squeezed in between the boxes and me, and we got started on our 30-hour trip across the country.

After about an hour and a half, my mom said, "This isn't going to work."

I knew exactly what she meant. We could barely move our arms as we were packed together tightly next to the boxes and other stuff.

"I want to try something," she said. My mom then shifted over and sat on my lap. Instantly relief came over me as my arms were finally free and at least I could breathe a little better.

She was sitting almost sideways with her legs toward the passenger side of the Jeep her ass and vagina perched directly over my cock. She smiled down at me.

"That's much better don't you think Tommy," she asked still smiling down at me.

"It's not too bad," I said and meant it. Mom felt lovely and warm on my lap. Even in the heat, I didn't mind her sitting there one bit.

"What's going on Kim?" my dad asked.

"We had to switch positions," my mom told him.

"We were way too tight on that seat. I'm sitting on your son's lap."

"Are you sure you two are comfortable like that?"

"It's like having a beautiful butterfly on my lap," I said. "She doesn't hardly weigh anything."

I honestly wasn't trying to say anything that I thought would embarrass her. I really did mean what I said.

I'm proud of my mother. She really is pretty, and, at only 100 pounds or so, having her on my lap was not a bother at all.

Unfortunately, at that moment two things happened that would steer the course of what was to come over the next couple of days.

The first thing was my mom blushed at my compliment. The second, my cock began to act of its own accord.

With my mom sitting on my lap, I could feel her ass and smell her perfume, and my cock instantly started to rise.

I swear I tried to stop it. I tried to think of anything other than what was happening on my lap. The more I tried the harder it got.

* * * * *

I wasn't excited about this trip. Of course, I wanted to see my son, and I would do anything to help my boy, but things had become very rocky at home with my husband.

We got married right out of high school, madly and passionately in love. Ben was the star football player with a scholarship, and I was the cheerleader.

I wasn't your typical dumb cheerleader, though. I wanted to major in marine biology and my grades never went below a 3.5. We were the perfect All-American couple. For a couple of years anyway.

Then Ben hurt his knee freshman year in college. He had gone out drinking with his frat buddies and fell off of the stands on the football field.

Thankfully he didn't get hurt worse than he did. He suffered a head injury in addition to his broken knee.

Due to the head trauma, he would never be able to play football again, even if he had regained full use of his knee. The accident also caused him to lose his sense of smell.

I never stopped loving him, and supported him as much as I could. But Ben became sullen. He brooded about what could have been, and there was a very rough time when he drank a lot and got into fights at the local bars.

Ben also cheated on me at least a few times. He admitted as much one night in a drunken, weepy daze.

I almost left him then. I was devastated, and went out and made a mistake. I met a handsome biology professor from the same college.

He had noticed me but never made a move because Ben and I were together. I wasn't one of his students so it wasn't as scandalous as it sounds.

We had a very sexual affair for about two weeks. This only magnified the other problem with Ben, he used to fuck me two or three times a day, but since the accident, he barely touched me.

We used to have a decent sexual relationship. Ben's dick was plenty big enough for me, so I never had a reason to complain other than wishing he was more adventurous. Therefore, it was even more hurtful to me that he had cheated.

The professor, though, had absolutely no inhibitions. The two of us did things Ben never would have done.

He loved sucking my pussy and was the only man who had ever made me squirt. He also was the first and only guy to take me in the ass. Ben said that eating pussy and anal fucking were disgusting.

I have to admit it, but I was always more sexual than Ben. Don't necessarily call me a slut, but I definitely don't have as many inhibitions as most people. The affair didn't last very long with the professor.

I found out he was married too, and his wife figured out about us. Feeling like I had gotten even with Ben, and let's be honest I still loved him very much, we decided to give it another shot.

I decided that maybe a baby would solve our problems, and it did.

Nine months later, Tommy was born, and, over the next 15 years, things were good. Sure, like every couple we had our problems, but nothing like early on in the marriage.

Ben became obsessed with his son growing up to play football and do what he could never do: play in the NFL.

It was not until a couple of years ago that it became apparent Tommy didn't want to follow in his father's footsteps.

Tommy is, for one, a lot smarter than his dad, and academic pursuits were always more interesting to him than athletic ones.

Now Tommy still had a muscular body from his dad's good genes, and for a while, he did try to pursue football wanting to please his father, but it was never his passion.

I am very proud of my boy. Tommy is a lot like me. He enjoys academics much as I did when I was his age. He is a handsome, well-adjusted young man who someday is going to make a great husband to some lucky girl.

It was at that time he told us that he wanted to go to USC to pursue biology. Tommy loved the study of the human body and couldn't read enough articles about how great the program at USC was. This didn't please his father, of course.

However, after some discussion with me and a lot of grumbling, Ben finally relented and said he would help him to go there.

Unfortunately, times were tight and Ben being only a construction worker meant he didn't make enough to afford to send and support him to an out of state college like USC.

That is when his sister, Tommy's Aunt Sarah, stepped in and offered to help.

Ben, although agreeing to let his son do what he wanted, started to revert to when he was young, and first got hurt.

He also got laid off after Tommy left, which led to him drinking again. Although I didn't think he was cheating again, he barely touched me anymore.

On top of everything else, the car needed a new air conditioner that we couldn't afford now that Ben was laid off.

So here I was sitting on my son's lap with no air while driving through the Nevada desert and I was starting to sweat.

I loved my son, and, believe it or not, I even loved my husband for all his faults. Tommy didn't know his dad was out of work again, and, after everything that just happened, we agreed not to tell him until the time was right.

Besides, there was another situation between Ben and me that we didn't want to tell Tommy about, one that was causing most of the friction between us right now.

As I was trying to get comfortable on my son's lap, I felt something poking me. At first, I thought maybe I was just sitting wrong, but then I realized what it was.

Tommy was getting a hard-on! Then he made an innocent comment about me being as light and pretty as a butterfly, and I couldn't help it, I blushed.

After so many weeks of not getting attention from Ben, any attention made me feel good even if it was from my son.

Both my blushing and my son's cock poking my bottom immediately made me embarrassed. It also created a stirring down in my loins that I hadn't felt in a long time. I couldn't believe it I was getting turned on.

"What are you thinking?" I thought. "He is your son."

I desperately tried to push the thought out of my head, but my pussy acting on its own accord began to get wet.

I understood that with boys it's sometimes beyond their control, and I tried to tell myself that it was just the motion of me sitting on his lap that was causing the erection.

I couldn't sit back over on the seat again. That was excessively uncomfortable, but what could I do?

Over the next few minutes, I tried in vain to stop my body from betraying my inappropriate physical reactions.

I wondered if my son was doing the same, feeling embarrassed that he was getting hard with his mother on his lap.

It appeared we were both silently contending with an uncontrollable lust neither of us could acknowledge.

"You two okay?" Ben asked. "It's awfully quiet back there."

"I was just thinking how hot it is back here. Tommy, could you roll down the window, please?"

Tommy obliged his mother.

"Yeah, Mom, it is getting a scorching back here now." He stressed the word "very."

Was it my imagination or was there a little innuendo in his voice?

"Are you sure you guys are comfortable in that position?" Ben asked

"It's hard," Tommy said. "But okay, too."

There it was again. Was that another innuendo from my son? My mind raced.

Because it was summer, I was wearing a light dress, and I never wore panties. I always enjoyed allowing her to breathe freely.

This only compounded the problem, as there was nothing to absorb the juices leaking from my pussy.

The incredible feeling of my son's cock gently rubbing my pussy had me leaking quite a bit. There had to be a big wet spot on his shorts by now, and there was little doubt he could now feel my wetness.

At this point, I didn't know what I was thinking.

My pussy continued to betray me, and, with my son's bold innuendos, it began to get even wetter.

I knew it was wrong, but I couldn't help myself I started to move a little...back, then forward. Just ever so slightly I began to grind my son.

I could feel the lips of my pussy gently rubbing his cock through his pants. It felt wonderful and so very wrong.

Somehow that made me want to continue even though every rational bone in my body told me this was wrong.

I knew from driving the Jeep often that there was no way Ben could see directly into the backseat, especially with all of Tommy's boxes and stuff.

My body tingled with electricity at the feeling of my pussy grinding on my son's hard cock. So many thoughts raced through my head.

I knew how wrong it was because this was my son. My husband just feet from me. However, my body almost couldn't control itself as I slowly moved back and forth on my son's rock hard cock.

What I was doing felt as natural as breathing. How could something that was so wrong feel so very fucking right?

* * * * *

I couldn't believe it! My mother was actually grinding on my cock. It felt incredible, and uncomfortable because I really wanted to free my cock from the confinement of my shorts but how could I.

I never would have believed that my cock could have attained this level of hardness if this wasn't actually happening.

When I first made the comments to my dad, I didn't think that either one of them would get the innuendo, especially dad.

I just thought this would be a private joke for myself I would only share during my deepest, darkest masturbation fantasies.

As all of this was happening a realization, hit me like a ton of bricks. I loved my mom. Not just as my mother but as a woman.

Somehow I had never understood all of the things that were now so suddenly very clear to me. How had I missed all of the signs? I thought back to all of the times she had helped me in my life.

Our interests were so similar. I wanted to study Biology because of her. I liked reading and writing as much as her and based on what was currently happening to me, I surmised that I wanted sex as much as her.

It occurred to me at that moment that I wanted her for myself, dad didn't deserve her. She was too good for him.

Feeling her warm body on my lap with my cock protruding up towards her pussy I realized that I needed to make a decision, right now.

Dare to try and push things further or not do anything. If I guessed wrong, the consequences would be catastrophic.

Dad would kill me, and I would risk upsetting the most important person in my life: my mom.

I decided now or never. Very cautiously, I placed my right hand on my mom's bare thigh. Only a little in case I was wrong. I could always just say I didn't realize where I put my hand.

She didn't move it away. My mother even gasped slightly. I decided to go for broke. If anything was going to happen, I would know in the next minute.

I very slowly started to rub and caress her leg. Back and forth ever so gently. Oh my God! I could even feel and see the gooseflesh on her tanned thigh. She gasped again only a little louder.

"Everything okay, hun?" my father asked.

"Just getting a little hot back here," my mom replied. I couldn't believe it. Her double meaning was clear to me, but not to my oblivious father.

"Okay, maybe we can stop soon, and we can all walk around."

"No, that's okay, Ben. I can handle the heat. We should try to make some time before we stop."

* * * * *

I felt Tommy's hand on my leg. He was starting to gently caress my thigh. Every bit of my conscience told me to make him stop or move his hand away.

The problem was every bit of my sexual desire said this felt so good. After weeks, and actually years, of being ignored by my husband, I gave in to the carnal desire that was not only my son's hands on me but his rock hard cock pressing up against my pussy.

I was no longer his mother; I was a woman who needed satisfaction. Against every natural law, I allowed him to continue.

After a couple minutes of him rubbing my thigh and my slowly grinding him, I turned and looked him in the eye.

The electrifying looks we gave each other were enough to light up Las Vegas. His beautiful blue eyes stared up at me with incredible passion and want as he gently rubbed my suddenly warm thigh. My heart stopped as I looked into his eyes with full-on lust.

I wanted to kiss him but didn't dare with my husband only a few feet away. "Dammit, Kim what are you doing," I asked myself. My response to my own question was answered immediately. As I allowed my son to continue his exploration of my leg even further.

* * * * *

I continued to caress her thigh while looking directly into my mom's eyes. The look she gave me was unlike anything I had ever felt. It was one of pure lust and affection. Those eyes said, "Don't stop."

"I think that's a good idea, Kim. We should really try to make it through Nevada before we stop. You sure you two are okay riding like that for a while."

"It's hard, but I think we'll manage." My mom's innuendo about my steel dick poking her pussy was not lost on me.

"Maybe you can put some music on so we can pass the time. Don't we still have that CD of road trip music you made in the player from last time?"

"Yeah, that sounds good," my dad replied and soon he was humming and singing to the music.

I still couldn't believe she was letting this happen. Until a short time ago, I never really thought of my mother sexually. But now I knew right then that I wanted her more than anything else in my life.

I know she is hot, of course. My friends are always giving me the standard shit about how they want to fuck her, but I never really thought that much about her in that way. Until now.

Suddenly, over the last half hour or so, I had become acutely aware of how hot she really was. As I looked at her, I studied her features for the first time as a woman.

Her dark hair hung over her shoulders in a style more suited to a young girl than a 39-year-old woman.

Her beautiful brown eyes looking into mine had butterflies flying around in my stomach. Not to mention her body. God, it was fantastic.

Years spent in the gym had paid off keeping her figure slim and trim. Her perfect large C cup tits were as perky as young girls.

She had apparently spent time tanning as well as I admired her smooth dark legs. I couldn't take it anymore it was time to go for broke.

I continued my exploration up her thigh and under her dress to her soft pussy lips. God, they were so wet I could feel the juices leaking slowly out of her luscious vagina.

She made no move to stop my fingers from probing her pussy. In fact, she parted her legs more, giving me even better access.

She then let out an, "Oh God."

"What's that?" my dad asked.

"Nothing. I was just stretching a little," Mom said almost breathlessly.

Dad went back to driving and humming while I continued my exploration of my mother's pussy. It occurred to me as I was doing this that 19 years ago I had come out from between those very same lips.

* * * * *

I knew how very wrong this was, but oh God it also felt so fucking right! I had to be careful not to make too much noise.

Normally I'm a screamer, but in my current situation that would have been inadvisable. If Ben suspected anything at all, things would be very bad.

Forget about the incest for a moment, he was also a very jealous guy (and I already pointed out how big he is).

The point: it would not go well if Ben found out what was going on directly behind him. But, wow, was it worth the risk for how good I was feeling at the moment.

I didn't want this feeling to stop. My reservations about the situation and my son had, for the moment, disappeared completely.

I was no longer his mother, I was no longer a wife, I was a dirty slut that needed to cum - and soon! This was the moment that I knew, against all rational judgment, that I was going to fuck my son!

Tommy continued his welcome assault on my pussy with his fingers while I slyly tried to play with my tits through my dress. I was very thankful for my husband's anosmia because the car was starting to smell like sex.

It was taking a herculean effort to not just rip open my dress and start riding my son like a bronco. I did my best not to make too much noise but damn that boy knew how to finger a woman. Where had he learned how to do that? And to do it so well?

I had to see my son's cock. I turned to look at him again and whispered,

"Take it out, please." I knew the risk was high, but at that moment I didn't care.

He gave me a slight smile as he removed his hand from my pussy and began to fumble with his zipper. I put one hand on my pussy and started to rub it. The other hand waited patiently for Tommy to remove his monster from his pants.

"Oh my God," I thought as he finally unbuttoned his shorts and released his cock, "it's bigger than my husband's."

It truly was. The length was a good inch larger, and the girth was much bigger, and I could never remember seeing my husband's cock as hard as the one my son was now showing her. The mushroom tip of Tommy's cock looked like it was going to explode any second.

I sat up. Knowing what I was about to do was in every way wrong just made me even wetter. I was about to cheat on my husband. I was about to commit incest.

I think I almost came right then thinking about the implications of what was about to happen. My pussy was perched just inches away from my son's cock.

"What's wrong?" Ben asked.

"Nothing just stretching," I replied as I slowly lowered myself onto my son's engorged member. The moment it touched my pussy I felt a jolt of sexual electricity.

"Oh...ah..."

"What?" Ben said.

"Nothing. I told you I was stretching. I'm just working out a hard cramp." My statement dripped with innuendo that only my son would understand.

"Okay," he said and returned to his music.

The feeling of the tip of his cock beginning to penetrate my pussy was fantastic. As I continued to lower myself onto him, he began thrusting upward.

"Ahhhh," I gasped as he continued to penetrate deeper into my pussy.

"You sure you're okay?" Ben asked.

"I'm fine. It's just so hot back here." And it was. I was really beginning to sweat. I was dripping onto my son's lap as he finally bottomed out in my pussy.

"Oh God," I murmured again. I couldn't help it. The pleasure and fullness of having my son's cock buried inside me was beyond anything I had ever felt.

This was the point that all boundaries had been crossed. Up until this moment, we had not done anything that we couldn't come back from.

But, now with my son's huge cock penetrating, me we had crossed the line into full incestuous sex...and, motherfucker, it felt so good.

"I'll try to get the AC fixed once we get back home," Ben said.

"It's getting even hotter back here, but I think we can manage," my son said. Ben oblivious to the actual meaning of my son's words.

I began to ride him slowly up and down, very conscious of the fact that my husband was only inches away.

Tommy thankfully helped by putting his hands on my ass and pushing me up and down. Not being able to really fuck me my son continued to slowly penetrate my pussy for over an hour.

We took turns as he slowly fucked in the backseat. Sometimes he would thrust up into me other times it was me grinding down onto his cock. The extended workout had both of us bathed in sweat.

After years of uninteresting sex, and weeks of no sex at all from my husband, the sheer naughtiness of what we were doing had me heading toward a climax, but to truly get off I needed to go faster and harder.

But at what cost? What if my husband heard us, or saw me in the mirror moving up and down? After an hour of slow movement, I decided to push things just a little and see what would happen.

I began bobbing up and down a bit faster, trying to make as little noise as possible. Even with the radio on, I could hear the occasional smack of skin on skin as my son, and I made illicit contact with each other's body.

Tommy had pushed his shirt up a little, allowing my bare ass cheeks to slap against his lower stomach.

I was literally dripping with sweat at this point, and I really wanted to get naked, but there was no way that could happen at the moment.

My husband didn't seem to notice and just kept on humming with the radio. I felt my climax building and knew it wouldn't be long.

Just then, my husband said, "Hey, I need a little break to piss and stretch my legs. There's a rest stop ahead in about seven miles. I think I'm going to stop there."

"Do you want to come and stretch your legs, too, Tommy?" my husband asked.

"I'm definitely going to cum, Dad," His double meaning was meant for me.

"I'm going to cum, too," I said, barely below a shout. "I just realized how much I have to go."

"Good," he said.

We began going even faster than before. Not quite a full-on fucking, but enough so that if my husband glanced in the mirror he would definitely know something wasn't right.

Our clothes completely soaked in sweat. Once again I thanked the accident that caused my husband to lose his sense of smell as the backseat now had a considerable odor of sweat and pussy.

Thankfully, Ben didn't look back, instead focusing on the road ahead.

It was my son who came first. He filled my pussy with massive blasts of sperm to the point that it started to leak out.

He sent rope after rope of cum up my pussy immediately making me cry out once more.

"Oh my god" I cried as the feeling of warm cum coated my inner cunt.

"Jesus can't you fucking hold it," Ben snapped.

The cum leaking out of my vagina caused an immediate problem as the wetness around my pussy, and his cock created an even louder smacking sound than before.

But there was no stopping me now. I had to cum. Nothing in this world was going to stop me. Even if at that moment my husband would have turned around, I wouldn't have stopped riding my son's enormous cock.

"Almost there," I said. It was a question to my husband and instruction for my son. Who kept thrusting upward with his still hard cock.

"Only another mile," Ben said.

I lost all abandon now. I began to actually fuck my son in the backseat only inches from my husband.

I bobbed up and down furiously, making smacking sounds loud enough for anyone to hear. Sweat poured off of my body as I built towards my orgasm.

"Are you going to make it?" Ben asked.

"Jesus Christ," I whimpered as my orgasm came like a freight train, exploding around my son's cock. It took everything I had not to scream out loud.

"What?" he said.

"I just have to go really bad," I somehow managed to whisper as my orgasm overtook me.

This was without a doubt the best cum of my life. It was beyond the times with the professor.

It was beyond the first time Ben, and I fucked in high school. And it was beyond the first time I had ever cum. This was pure ecstasy.

The pure incestuous nature of fucking my son and doing so only feet from my husband had given me the best orgasm ever.

"Okay," Ben said pulling the car into the rest area. "We're here. What was that smacking sound I heard?"

"Oh, Mom's legs fell asleep, and she was trying to get the circulation back in them," Tommy said, thinking quickly.

Slowly lifting myself off of my son's now softening cock, I pretended to fix my makeup for a second to give Tommy time to put away his member.

"I'll be there in a minute," I said.

"Okay." Ben got out of the car and walked toward the restrooms.

As soon as his back was turned I began trying in vain to clean the mess of mixed cum trickling down my leg with a wet nap I found in my purse.

It was no use I was going to have to try to make it to the bathroom with cum running down my leg.

"I love you, Mom," Tommy said. As he stared up at me not even trying to put away his cock.

That was it. Upon hearing from my son the words that had been spoken so many times, but this time with an entirely different meaning, I knew my life was forever changed.

"I love you, too," I said and gave him a kiss that no mother should ever give a son. We made out like teenagers for a minute or two. Then I remembered his father.

"You had better go before he gets suspicious." My son then began to put away his glorious cock.

"It's going to be a great ride home," Tommy said smiling.

"Oh, baby, you have no idea." I gave him a smack on the ass as he left the car and headed toward the rest area.

I managed to make it to the bathroom without looking too peculiar. Later I saw a couple of drops of cum on the pavement when I was coming out.

I took one look at myself in my mirror after I had peed and cleaned up.

"You dirty slut. You just fucked your own son," I said to myself with a smile, knowing that this was not going to be the last time. Oh, I had plans for my dirty boy.

The End