Evolution Pt 04

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 wake up before my alarm feeling refreshed. It's 6.20am on Friday morning. Laura stirs as soon as I move and smiles at me with her head still resting on the pillow.

"Morning honey," she says, and strokes my face with her hand.

I smile back at her, and ask "Did you sleep OK?"

"Like a baby," she answers.

We chat about our plans for the days ahead. It's Friday, so Laura and I are visiting her sister Emma and her husband Jack tonight.

I'm a little nervous about seeing Emma after the last time. I called to her house on Wednesday evening after work to collect something of Laura's, and I made a teenage grade pass at her. Thinking with my dick as usual.

I've been on edge ever since, fearing she would tell Laura, or Jack. I've heard nothing about it since, so hopefully no news is good news.

"I've been thinking about Jean a bit lately," Laura says.

Oh shit.

"Really, how come?" I say, trying to sound disinterested. But my heart is pounding.

"I think you should invite her and Pete over for lunch on Sunday," she says. "We've only met a few times. I'd like to get to know her better, she seems really nice. We always hit it off on those boring company event things you drag me to."

Oh this is not good. What is Laura up to.

"Good idea baby, I'll mention it to her at work today," I say, playing it cool.

I better go along with it, I can't make a big deal here or she will definitely think something is up.

I go to the en suite to take a piss, brush my teeth, and then jump into the shower. I'm washing my hair when I feel a hand reach around me from behind and grab my flaccid dick.

"Thought you might need a hand," my wife says, as she works her magic grip up and down my shaft, making it harder with each stroke.

The lather from the shampoo is nice and slippery, and it's making the handjob feel sensational. She then reaches her other hand between my legs from behind and plays with my heavy balls.

After a minute or so, Laura takes it to the next level. She moves the hand she was using to play with my balls, back onto my perineum. She stays there for a few seconds and runs her fingers in circles, before going back a little further to my asshole. Jesus, Laura has never touched me there before. Then without any further warning, she inserts her middle finger.

My ass grips her finger tight, and she keeps wanking me slowly with her other hand, the water from the shower beating down on both of us throughout all this.

The grip loosens on her finger as my ass relaxes. Laura then starts pushing her finger in further, until it's in past her second knuckle. She starts fingering me and jacking me off at the same rhythm.

I don't last long, and when I tell her I'm about to come, she makes me turn around to face her and drops to her knees.

She swallows my full length down her throat, holds me there while she reaches between my legs and shoves the same finger back up my hole. My cum gushes out and straight down her throat.

"That was un-fucking-believable," I say, when I'm able to talk. "Where did that come from?"

"You have your own whore at home you know, just remember that," my wife says, not answering me, as she steps out of the shower.

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I tell Jean about Laura's invite as soon as I get to my desk.

"Absolutely, what a lovely idea. We will definitely call over for lunch on Sunday," Jean says, not seeming at all skeptical. "I can't wait to have a proper chat with Laura when it's just us, and not at a company retirement party or some other bullshit."

What a crazy weekend I have in store. First, I have to get through being around my sister-in-law tonight, probably spending the whole time hiding fucking boners again like a kid. Then I have my wife and my.....Jean.....whatever she is, bit on the side I suppose...... having lunch together on Sunday. At least I can relax on Saturday when it's just Ben introducing us to his girlfriend.

Work is hectic this morning, and worrying about the weekend isn't helping my stress levels. Laura blew my mind, and my nut sack, in the shower this morning, but by 12pm I'm getting that old familiar tingling feeling back again.

So I call over to Jean and tell her to get under my desk. She dutifully obliges. A suck from a vacuum cleaner like her is the best kind of stress relief.

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I leave work early today, as I often do on Fridays. It's usually a nice way to start the weekend. But today I'm meeting Ben for a training session. We do an hour and a half, and I'm wiped out after it. So I have a nap for 45 minutes.

It has really hit me over the last few days how much I have let myself go. My training sessions with Ben have proven just how unfit I am, and I've paid more attention to what I'm looking at in the mirror as a result. I'm overweight, and I need to do something about it. I don't know how I've managed to hold onto Laura looking like I do at the moment, she could literally have any man she wants.

So I have decided to turn over a new leaf. I'm fully committed to my training sessions with Ben, pushing myself harder than I ever thought I could. It's healthy eating from now on too, and no more alcohol. I'm going to be the man Laura (and Jean) deserves. It's very possible that both of them are with me just for my cock, but I'm determined to change that.

When I wake, it's time to get ready to go to Emma and Jack's. Dread and excitement course through me in equal measure.

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We arrive at Emma's just before 8pm. Laura is wearing a pair of faded black skinny jeans that really show off how perfect her ass is. The frayed ends on the legs stop a couple of inches above her ankles, with the bottoms of her tanned legs visible.

She's wearing a plain white tight fitting vest top, her toned arms on display. Her hair is up in a messy high bun, with a few strands hanging down around her face.

Emma opens the door and welcomes Laura with a hug.

"Hey Tom, how are you?" and I get a warm hug too. So far so good. "Jack is down in his den watching the game, you go on down to him. I'll bring you a drink. Beer?"

"Just a soda Em, thanks," I reply.

"He's on a new health buzz, don't ask," Laura wades in, rolling her eyes.

"Good for you Tom. I think it's great Laura," Emma says, defending me.

The kids are all in bed, so it's just the four adults. The den is far away from their bedrooms, so we don't need to worry about waking them up. They have a huge house, the rich bastards!

Emma is looking very well by the way. She's wearing a pair of those faux black leather pants, practically spray painted on. And a loose fitting red blouse. She must still be a little conscious of the extra weight around her belly after having the the kids. She doesn't need to worry if you ask me, but she is probably working on getting her old washboard abs back before wearing anything more revealing. The good thing is her top doesn't cover her ass, so I can see it in all it's wonderful glory in those pants.

Anyway, I make my way down the hall to Jack, who is stretched out on one of his two recliners, beer in hand, watching the game which has just kicked off.

"Tom, how the fuck are ya?" he says as I walk in, lifting his hand offering me a fist bump.

"Hey Jack, what's up?" I say back.

"Ah same shit. All good though," he says casually. "Is Laura with you?" he asks.

"Yeah, she's in the kitchen with Emma," I answer.

I don't think Emma has said anything to him. OK, I think I can relax a bit.

Emma comes in with my soda and leaves it on a table beside the recliner I'm vegged out in. Her ass when she bends over is fucking mouth-watering.

"Laura tells me you've taken up running. That's really great," she says, and means it.

"Yeah, I need to do something about losing this timber I'm carrying," I say, as I tap my belly.

"Don't be silly Tom, you look great. You're right to get fit and stay healthy though, but you don't need to for that reason," Emma says and places an affectionate hand on my shoulder.

What the hell is going on? Is she flirting with me? Has she completely forgotten about what I did the other night? Does she want me to do it again, or more? But she told me to "stop". My head was fried.

"Aw, thanks Em, but you have to say that because you're family. Well, sort of," I say back.

She just smiles back at me and squeezes my shoulder as she leaves.

"Did she say if the food is ready?" Jack asks when Emma has left. He obviously wasn't paying much attention.

"I don't know buddy. I just don't know," I say.

The food was ready. Laura came to get Jack and me a few minutes after Emma left the den.

"Wow Laura, nice outfit," Jack says as all three of us are walking to the kitchen. He puts his hand on her lower back as he walks beside her.

Emma is busy at the cooker, and she tells us all to grab a plate and help ourselves.

Ben takes another beer from the fridge, and Laura pours more wine for herself. I'm sticking to the soda, and Emma asks me to get one for her too.

The food is delicious, Emma has always been a really good cook. When we're finished, I start to clean up, but Emma stops me telling me to leave it, that she will do it later.

So we all move into the sitting room, with Laura and Jack both getting another drink for themselves. Emma and I are sticking to the sodas.

We spend the next hour chatting, about the kids mostly, but also work and other general stuff. Laura and Jack have both had a few more drinks each. Laura is halfway through her second bottle of red at this stage. Jack is on the whisky. Both of them are getting a bit drunk, slurring their words and talking a bit louder than necessary.

Emma says she is going to tidy up a little bit, and that she would be back soon. The other two don't seem to even hear her, they are deep in conversation about Ben's job prospects once he finishes college.

I decide to go and help Emma, and being honest, spend a little time alone with her. She is standing at the kitchen sink, exactly where she was on Wednesday evening when I moved close behind her (I stuck my hard cock between her thighs that time, but I'm trying not to be vulgar).

"Hey Em, just thought I'd give you a hand, we left a pretty big mess, didn't we," I say.

She doesn't answer me. Or even turn around. What the hell. I thought everything was OK between us. She was so nice to me earlier, and hasn't been acting in any way weird with me all evening.

"That was a lovely meal you cooked Em, thanks so much," I try again.

Still nothing. OK something is up.

I'm looking over at her from the kitchen table, her ass is pure perfection in those black fake leather pants. Her ignoring me is starting to piss me off a little bit, but she looks so fucking sexy it's having an effect on me. She is so tempting the way she's standing, slightly bent over the sink.

I'm reasoning with myself, maybe she would be more receptive of me tonight. She didn't push me away or anything on Wednesday. If it wasn't for Jack coming home, who knows what would have happened.

I walk the few steps over to the sink, and stop about two feet behind her. That perfume again. I'm hard, but the pants I'm wearing are a little more restrictive than my suit pants, so my erection isn't protruding nearly as much as Wednesday.

My eyes are focused on that thigh gap again, which looks even more enticing in these pants. Emma is continuing on with the washing up as if she doesn't even know I'm there. There is no doubt she knows.

I reach my right hand out and place it on the inside of her left thigh, and hold my breath. I can hear the faint talking and laughs coming from Laura and Jack in the sitting room down the hall. But no reaction from Emma. She doesn't even stop washing dishes. (Why she doesn't just use the dishwasher, I really don't know).

I gently massage her thigh with my fingers, which gives me an enormous thrill, it feels so good. Then I start to move my hand very slowly up her inner thigh. I'm right at that glorious thigh gap now, my thumb grazing her ass cheek. Still nothing from Emma.

So I take another step up behind her, move my fingers and palm around the top of her leg until I'm cupping her ass in my hand, right in between her cheeks, my fingers pressed up against her warm pussy outside her pants from behind. Then I wait.

Absolutely no response. But she does stop washing up.

I move my fingers slightly against her, massaging what's in my hand, squeezing her gently. She hasn't stopped me so I decide to see where I can take this.

I use my left hand to unzip and unbutton my pants, and open them enough to awkwardly pull out my cock, which is throbbing with excitement. When I have it out, I slowly run my hand up and down my shaft, standing behind my sister-in-law. Jesus, what am I thinking? Not now Tom, I imagine my cock say in response to those doubts.

I remove my right hand from between Emma's legs, and position my cock at the rear entrance to her gap. Then I take the final step forward, pushing my eight inches through until the tip hits off the cupboard door under the sink on the other side. I breathe in deeply through my nose, inhaling the smell of her shampoo. She still hasn't said a word.

I place both of my hands on the rim of the sink, on either side of Emma's waist, and slide them together until they rest against both of her sides. Then I press my hips into her ass, grinding my cock up against her pussy. I love the feeling of her pants against me.

I increase my grinding, only a tiny bit. I feel her push her ass back against me, away from the sink, only a couple of inches, but enough so that my erection isn't hitting against the cupboard door now. I tilt my head to the side, and I can see her looking down towards the floor. I follow her gaze - she is looking at the part of my cock sticking through between her legs.

Her breathing has changed slightly. Not very noticeable, but a change all the same. Getting brave, I take both of my hands off the sink and place them on Emma's waist. Now I really increase my thrusts from behind her. Each time my hips hit her ass, the breaths exiting her lungs are audible little gasps.

I'm really into it now, slamming her from behind, imagining I really am fucking her. I'm getting just enough friction on my cock to be slowly bringing me towards blowing my beans.

Emma crosses her legs, bringing her right foot across in front of her left ankle, and squeezes her thighs together, just a little. This extra tightness feels amazing. She's still just looking down at my cock, her hands haven't moved, and she hasn't uttered a word, the cock tease.

I still feel like anything new I try would be taking a risk with her, I'm even afraid to feel her breasts. I haven't uttered a word to Emma this whole time, nor her to me.

Emma crossing her legs has given me the extra sensation I need, and now I can feel my climax rising. A lot of precum starts to ooze from my prick just before I cum.

I slam her just a little bit harder, really humping her ass now, then squeeze her waist tight. My cum just starts to spurt up my shaft when everything changes!

Emma grabs hold of my cockhead sticking out between her legs in her fist, tight, and squeezes her thighs around my pole even tighter. A drop of cum dribbles out from my pisshole, and falls to the floor at Emma's feet. She has completely ruined my climax, and it feels like she's going to rip my dick off she's gripping it so tight. The pain is intense.

I try to step back away from her, but I can't move. My cock is still stuck in the vice like grip of her thighs.

"What the fuck Emma?" I whisper scream. "What the hell are you doing?"

"What am I doing?" she replies. "You really are a pathetic excuse of a man. Sneaking up behind me. Dry humping me like a virgin teenager. At least you took your cock out tonight I suppose, maybe you deserve some credit for that."

"What the hell" I try to say again, but she cuts me off.

"Oh shut the fuck up you idiot. You really are a useless fool. Do you not know how the world works now? You use who you want to use, just take them. But you.... you can't even do that right. You're not a man, you're a little fucking bitch."

I'm speechless.

"Laura's been telling me about how big your cock is for years. I always envied her having something like this in her bed to screw whenever she wanted it," she says, as she squeezes it again in her hand. "But you don't deserve a cock like this. It's fucking wasted on you."

"That's not fair Emma, you don't know anything about me," I say, trying to defend myself from this tirade.

"Well then fuck me if you want to fuck me. Don't fucking ask me, just take me if you want me. Don't waste my time with the shit you pulled tonight. And definitely don't fucking sneak up behind me like a weirdo creep, unless you're going to make it worth my while. Dry humping me, seriously?!" she says scathingly.

"If you don't care if I fuck you, then why did you tell me to stop on Wedne....." I say, trailing off. Because I realize now what was actually happening that evening. She was about to tell me to stop with the messing around and just do it, but I didn't give her the chance to finish. I was too busy reacting to Jack arriving home. I feel pretty stupid it's taken until now for the penny to drop.

"I was going to say stop rubbing up against me, and fuck me." Emma confirms. "But you turned into a pussy when you heard Jack and didn't let me finish speaking."

"Can you blame me for panicking when I heard him. What would have happened if he caught us," I say.

"Who gives a shit. He's been screwing Laura for years. He wouldn't fucking dream of doing anything if he wants to keep his dick intact," said Emma. "Actually, I think he first fucked Laura three years ago, literally the day the new laws came into effect."

I can't believe what I'm hearing. I'm frozen on the spot, and I can't breathe. Laura is fucking her own brother-in-law. Emma only realizes just now that I didn't know. And she sees my heart break before her eyes.

"Tom, I'm sorry. I just assumed you knew," Emma says, putting her hand on my arm.

"No," I whisper.

"It doesn't matter Tom. It's just sex. It doesn't change how Laura feels about you. She loves you with all her heart, but everything is different now, you know that," Emma says consoling me, but trying to make me see clearly.

Emma is right. Everything she's said. It's time I grew a pair and embraced this world once and for all. Laura has embraced it, and she's right too.

"A word of warning Tom. Your wife is into more kinky shit in the bedroom than you think, so man the fuck up. Oh, and she's majorly fucking jealous of that slut you work with, Jean I think? She thinks you're getting a bit too close to her, that it could be more than sex. So make sure you keep it that way - it's good to keep Laura on her toes. Just make sure you give her enough of this and she'll be happy," Emma tells me, saying that last bit as she caught hold of my cock, which is hardening again in her hand.