Evolution Pt 03

Warning: the following story contains graphic descriptions of very casual sex. If that is not to your taste, I would suggest you read something else. This is all complete fiction. I would never condone or tolerate in real life the behavior described in this story.

All characters are over 18 years of age.

I would recommend reading the previous parts of this story before you continue, as you may enjoy it better if you know the full backstory.

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I'm driving home from work, daydreaming about my surreal lunch in the restaurant this afternoon with Jean. The meal itself was perfectly fine, but it was the blowjob for dessert from a waitress underneath the table, at Jean's request, that sticks in the mind.

I'm so distracted I almost miss the turn to Emma's house. The reason I brought the car to work today.

Emma is my sister-in-law, my wife Laura's younger sister. Laura asked me to collect a cooking dish from Emma on my way home from work, as I would be passing her house.

Emma has three young kids, all under the age of 6, her youngest being just 9 months.

At 36, Emma is three years younger than Laura. I have known Emma since she was a teenager, when her sister and I first started dating. She and I always got on really well, and I have seen her grow into the wonderful woman and mother she is today.

If truth be told, I have grown quiet attracted to Emma throughout that time also. The thrill of the forbidden is most likely the root of my desire towards my sister-in-law. But nothing could ever have happened between us for obvious reasons.

However, I have a suspicion that Emma may quietly repress her own little bit of lust towards me also. It's nothing she has ever said or done, just a feeling I get when I'm around her. Maybe that's just wishful thinking by me, giving myself an ego boost.

Emma is a very attractive woman, and totally different to her sister. She is 5'6" so taller than Laura, and has kept her natural dark brown hair. Laura is more tanned, while Emma has a paler complexion with higher cheek bones.

She is not as sculpted and toned as Laura. The signs of having had three kids recently are evident, and she is still in the process of losing the last of her baby weight.

But she has managed to keep her statuesque posture and grace. She also dresses more modestly than my wife. The words 'prim and proper' spring to mind when thinking about Emma.

My wife Laura on the other hand, is pure sex on legs. She has bleach blonde hair, almost white in color, dresses a little slutty with her legs and tits on show most of the time. Her teeth are perfectly white, and she has regular manicures and pedicures.

Side by side, Laura is the clear winner. She has always been the one guys leered at. But there is just something about Emma that makes my loins purr, and that feeling has only intensified as the years have passed.

Emma has a demeanor that could be construed as standoffish. I see how some people might think that. But she is never that way with me. Maybe it's down to the length of time I've known her, or perhaps it's because of the little soft spot for me that I like to imagine she has.

I've whacked off thinking about Emma for years. I've even fucked my wife imagining it was her sister. I know, I know, I'm an asshole.

Then three years ago our world changed, and my desire for Emma intensified five fold.

Emma has always been my ultimate fantasy. But I fear if I act on my urges with her it would be a line crossed in Laura eyes. So instead, I focus on living out my fantasies with Jean, the next best thing in my warped brain.

I'm addicted to Jean at this point, and I think Laura knows it. If I step into the abyss and take the ultimate prize in Emma, then that really is going into the unknown.

However, every time I see Emma, my resolve to stay away from her diminishes a tiny fraction. In a world where I can screw just about anyone, at any time, why do I obsess over her? Do I have a death wish for my marriage?

In the world we live in now, there is a big difference between sticking your dick into a random woman on the way to work, and banging your wife's sister. I can sense that I am already pushing Laura's tolerance with how often I use Jean, and she is only my work colleague.

My love for Laura is unparalleled, she is my sole mate, best friend, and the hottest piece of ass I've ever seen. But there is something inside me that craves the forbidden. The one I can't have.

Maybe it's boredom after being married for so long. Whatever the reason is, I'm not sure if I can keep away from Emma forever.

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Emma and Jack live in a particularly nice neighborhood, definitely out of our price bracket. I park on the peaceful, leafy street in front of their house. They have a big drive but only one car there at the moment, Jack must not be home from work yet.

I knock gently instead of ringing the bell, just in case any of the kids are asleep. The door opens a few seconds later, and when I see Emma standing there holding a washcloth in one hand, my heart quickens.

"Hey Tom, c'mon in," Emma says, leaning in for a hug.

She throws her free hand over my shoulder, her hand holding the cloth held out to the side, then pulls me in close. Her face touches against the side of my neck, and the subtle smell of her expensive perfume is divine.

Emma turns to walk back towards the kitchen, so I close the door behind me and follow her. My eyes lock straight on to her ass, of course, fucking horn dog that I am. She's wearing black yoga pants if you were wondering! With her loose fitting blue sports top covering the top half of her butt.

"Jack just called, he's working late, but should be home by 8.30pm," Emma says. "The kids are all in bed, so it gives me a chance to get some housework done."

It's 7.30pm now. I left work at 6.30, but traffic was bad so my commute took longer than normal.

"No worries Em, I'll catch up with him at the weekend," I say. "Hopefully the heavy traffic will have cleared by the time he leaves. I got stuck in it this evening."

"That sucks Tom. I was wondering why you're so late. Laura texted me earlier saying you would call by. I thought maybe you had forgotten," she says.

We chat for a while about the usual stuff like the kids and the weather, as Emma busies herself in the kitchen. She is mainly cleaning up after a day of three kids making a mess. It's nice viewing for me, and I sneak peeks of her body whenever she bends down to tidy up toys, clean food spills, and empty the dishwasher.

I'm sitting on a high stool at the island countertop in their kitchen, sipping the coffee Emma made for me, just enjoying looking at her do the housework. She is chatting to me so freely it's refreshing. I think the only other people she is this relaxed around are Laura and Jack.

Emma is telling me a story about something one of the kids did earlier in the day. I'm only half listening - the other half of my mind is imagining pressing her up against the wall and just be done with it, to hell with the consequences.

I'm snapped out of my trance when Emma puts the cooking dish down in front of me on the marble counter I'm leaning on, and it makes that loud sound things like that always make when you put them on a hard surface. She turns and walks over to the kitchen sink.

"Thanks Emma," I say. Then I stand to walk over with my empty cup to put it in the dishwasher beside where she is standing.

It's only when I stand up I realize how hard I am. I knew I was a little aroused, I always am when I'm around her. It's not easy covering up a cock my size. Even more awkward now as I'm still in my suit from work, and the material is doing nothing to help me hide my problem.

Emma has her back to me as she leans over the sink. That fucking ass again! I can't stop myself from looking. Before I know it, I'm standing right behind her. I can smell the perfume again I'm so close.

My erection is pointing straight out now, so hard it's painful. My brain can't take this, the level of willpower I need is not humanly possible.

Fuck it. I take another step forward, and rest my cock that's still tenting my pants in her thigh gap. Just the tip. She freezes.

Shit, what have I done. I'm waiting for a scream, or a slap, or worse.

Nothing happens. Thirty seconds pass, and still neither of us move. Emma was hand washing some of the kids cups and plates, I can see that now over her shoulder. How the fuck did I get myself into this position. Letting my penis do the thinking I suppose.

I can feel the pulse in my cock, Emma must be able to feel it too. What is going through her mind?

This is such a surreal moment for me. One part of me wants to pull my prick back from where it's currently nestled, and run out of the house as fast as I can. But the other half is thinking, we've come this far and we're still alive. Let's see what happens. It's there for you to have, just take it.

The latter wins. I wait another twenty or thirty seconds, I think. Time has frozen for me. Then I press forward ever so slightly. I can hear her shallow breaths now. There is a tremble to her breathing I've never heard from her before. Is she excited? Afraid? Surely not afraid, of me.

I push forward once more, then...

"Stop this...," Emma whispers, her breathing ragged.

She is about to say something else but there isn't enough time. I hear a car pull into the drive and headlights shine into the house through the glass beside the front door. Jack's home. I pull back from Emma quick as a flash and get back to where I was sitting before I hear his key enter the door. Emma has resumed washing the kids stuff as if nothing happened. Am I here an hour already? How did that go so fast?

"Hi honey, Tom's here," Emma calls out as the door opens.

Tom's here alright, and I can't even fucking stand up from the countertop that I'm hiding my boner behind. I'm like a fucking horny teenager, for Christ's sake.

Jack has probably fucked several other women already today, and he would assume I have too. He knows the drill. But I'm not so sure how he would feel about me sitting in his kitchen with a boner looking at his wife, my sister-in-law.

"Tom, I just called you on my way home. You must have missed it," Jack says.

"Shit, sorry. I left my phone in the car," I said.

"No worries man. I was just calling to see if you wanted to come over on Friday night to watch the game on TV," he says.

Emma looks at me sideways. Shit, I really hope I haven't fucked everything up.

"Sounds good Jack, around 8pm?" I ask.

"Perfect. Bring Laura too," Jack said.

My dick is soft again so I stand to leave. Emma walks after me to the door.

"See you Friday," she said, and gives me her usual hug goodbye. Then closes the door behind me.

I can't decide if I'm excited or terrified about Friday night.

All that's going through my mind is...she didn't pull away.

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When I get home Laura is in the kitchen on her own.

"Where are the kids?" I ask.

"Ben is over at a friend's house, and Claire is upstairs in her room. Why?" she says.

I don't bother answering. I take hold of her arm, guide her to the kitchen sink, and turn her around facing away from me. She is wearing yoga pants too! White ones.

I pull them down, and her thong. Then as I stand behind her I drop my suit pants and boxers down to my ankles, letting my rock hard pole spring free.

I don't wait another second before shoving it into her cunt, hard.

Laura's top is short enough that her sexy back dimples just above her ass are on show, one of my favorite parts of her body.

I grip her tightly by her hips and fuck her like a jackhammer. My thighs ram against her firm, tanned ass, making that unmistakable slapping sex noise we all know and love.

I was planning on pretending she was Emma, so turned on that I was from the 'events' earlier. But Laura is just so hot, it's impossible to think of anyone else right now.

She is grunting pretty loud, but probably not loud enough for Claire to hear.

Laura suddenly starts cumming, releasing a flood of her pussy juice onto my cock and down my legs. She is holding onto the taps in the sink as tight as she can.

I grab a handful of her white hair with my right hand, and yank her head back, then I slide my left hand from her hip, up her side and under her white training top, groping her left tit in my palm. Her skin the whole way up her body is so soft and flawless.

"Here it comes," I let her know, then I erupt deep into her pussy until I'm totally and utterly drained.

Laura leans back, turning her head so her face is over her shoulder, my cock still hard and inside her, and kisses me passionately, exploring my mouth with her tongue.

I pull my eight inches out and step back. What a fucking sight. The woman is a goddess.

I take off my shoes and pants, and walk upstairs to take a shower, naked from the waist down.

I'm drying myself off in our bedroom, the door open, when I hear Laura answer her phone.

"Sure, come over now though. I'm going to bed soon, I need a good night's sleep," she says.

I'm curious who that was, but I don't need to wait long to find out. Less than five minutes later there is a gentle knock on the door. I walk over to the landing, where I can see down into the kitchen.

A young man walks in when Laura opens the door. I notice she is still just wearing her top, with my cum dripping from her pussy, making her lips shine. Some has even ran down her legs.

When he turns around, I see that he's one of Ben's old school friends, Max. He's 19, same age as Ben. He lives pretty close by, so was always around here when they were young. They are still close friends and hang out all the time.

"Thanks for letting me come over," he stammers. "I can't stop thinking about you since Monday. That blowjob in the car was the best thing that's ever happened to me. Thanks again for the ride home from work."

"Ahh sweetie, you come over anytime. You're always welcome here. Tom just dumped his cum in me, and he makes such a mess. Do you mind? Or do you want me to suck you instead?" Laura says.

"Nah, I don't mind sloppy seconds. But would you mind sucking me for a minute first anyway?" Max asks.

"Of course honey, take off those shorts and sit down over there," my wife says, directing the 19 year old to a seat that gives me a much better view of what's going on.

Max strips off all his clothes, stumbling with the socks, and sits down fully naked on my recliner. Laura kneels down in front of him, pushing his legs apart so she can scoot closer. Then she swallows his cock to the base in one motion. He has a decent sized dick, maybe around 5 and a half inches, 6 tops, but not that thick. No problem for Laura, she is a master at taking my monster cock daily.

"Oh my God, I can't believe Ben's mom is sucking my dick," the poor guy says.

Laura just smiles up at him, his cock still in her mouth, then effortlessly takes him into her throat again.

"I've jerked off thinking about you for years," he goes on.

Laura moves down to his balls, licking them, and then takes them both into her mouth. She keeps stroking him as she does this.

Max must think he's dreaming, having a woman like Laura go down on him like this.

"Can we do it now," he says suddenly, "I don't want to come before I get to have sex with you."

Laura smiles kindly at him, and sits up straight with her bare ass on her heels.

"Whatever you want sweetheart. Would you like me to go on top, if you're a bit nervous," she says, picking up on the shake in Max's voice.

"Yeah. Sorry, yes please. Can you take off the rest of your clothes too? I really want to see your boobs," he says.

Laura stands up and lifts her top up over her head. Then she reaches behind her back, unclasps her bra, then gives Max a wink before letting it drop to the floor at his feet. What a sight. She has the tits of a 20 year old, not even a hint of sag.

Max has his right hand on his dick, slowly working it up and down as he stares at my wife. The guy can't believe how lucky he is. Laura is pornstar material.

As she is about to mount our son's friend, Laura looks over to the stairwell and catches me looking down at them. She gives me the most subtle smile, then continues with the show.

I'm standing on the landing, out of Max's view, but Laura can clearly see me wearing just a towel, with my erection lifting up the material in front.

She puts her right knee outside Max's left hip on the recliner, holds onto his shoulders and lifts her left leg over his legs and cock, and down to rest outside his right hip.

Before lowering down on his cock waiting for her, she sticks a finger up her vagina, then brings it to her mouth as she looks into my eyes. She's silently telling me she is tasting my cum that's still inside her. Fuck.

Then she sits down and Max's prick disappears up her pussy. Laura rides him slow at first, but gradually speeds up, her hands holding onto his shoulders for balance.

She decides to give him the full treatment, and starts gyrating her hips in a twerking/grinding movement as she continues to ride his cock. You know that thing only some women seem to be able to do properly. Laura is a fucking expert at it. The poor kid won't last much longer now she has started that.

Max had been holding Laura by the waist, giving her tits the odd squeeze, but now he grabs her perfect ass roughly and cries out as he shoots his load in with mine.

Before dismounting, Laura holds his face and gives him an unforgettable kiss, making out with him for at least two minutes. His mind must be blown.

I've held back long enough.

"Hey Max, long time no see," I say as I descend the stairs and walk into the living room, completely naked. Cock swinging between my legs, semi hard.

"Shit, I-I-I-I'm sorry," he says quickly, and tries to push Laura off.

Laura doesn't move. Instead I can see she is trying to hold back a smile.

"Relax Max, I hope you enjoyed fucking my wife," I say. "Some piece of ass, isn't she?"

"Eh, I g-g-guess so," he replies.

"How is college going?" I say, continuing with the casual conversation, making the poor kid squirm.

"Eh..." he mumbles, trying to think of something to say.

"You don't mind if I use Laura too. No need to get up dear," I say to my wife, as I move around to the front of the recliner, standing behind her now. She is still on top of Max, and now that I'm behind her I can see that his cock is still inside her.

"I'm so sorry," Max repeats, but I interrupt him before he can go on.

"No need to apologize Max. But I am going to need you to pull out of her for a minute. Stay sitting where you are though."

He pulls his cock out, making way for me. A sizable amount of semen falls out of Laura when he does this, but I have a great view of her pussy and can see it is still very sloppy. Max is going soft rapidly. I'm the direct opposite. Seconds later and I'm as hard as iron.

I squat down behind Laura, then move in between Max's knees - he pushes them further apart to make as much room for me as possible. I rest the tip of my massive boner at the entrance to her swollen fuck hole, and slowly glide it in. She is full to the brim with cum.

"Shhhit," she groans.

My cock is easily twice as thick as Max's, so the contrast for Laura may be taking her a second to adjust. But really she is probably just putting on a little show for our guest. I've been fucking her brains out with this thing for over twenty years.