Standalone scene (Part 2). This series is about a sister-in-law longing for a baby. When her husband can't provide her with what she needs, she secretly turns to his brother for help.

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After a week of mulling over your idea of donating my sperm for you, my sister-in-law, I decided to give it a try. Who knows if we're even a genetic match, but at least then you'll have tried everything while keeping your husband's ego intact. Chris is at a conference this weekend, so you asked me to come over. It’ll be quick, you said, as you showed me to the bathroom. All I have to do is jerk off into the cup that you placed on the drawer by the sink. Easy. Job done. Just like fixing that shower head...

So far, so good.

What I didn’t expect though is what will happen after I’ve done my part. Ten minutes ago, I passed the cup over, warm with a thick, white load, and you’d disappeared into the bedroom. You said I could leave, but I decided to stay. I’m not sure why. This was all just so… crazy. I’d just rubbed one out in my brother’s bathroom, harvested a pent-up three-day load, and now his wife was going to squirt it up her pussy. I guess I just needed a moment to let it sink in.

I rest my shoulder against the wall next to the bedroom door. I'm not even thinking about what you're doing exactly when I hear it. A long, drawn-out whimper. My senses switch on high alert. Heart pounding, pulse racing. Holy shit. I can hear you breathe quickly. Louder, faster. And then there’s a long sigh. Did you just… orgasm?

Do I stay here or do I leave now? Fuck. For some unknown reason, I decide to stay. And after another ten minutes have passed, I muster up the courage to knock on the bedroom door. 

After a long pause, I hear you chirp: “Come in!”

So I do.

When I step inside the bedroom, you’re on your back, hips lifted, legs open with a blanket covering your lower half.

“Uh… hi,” I say. You smile at me. “All good?” I ask awkwardly.

“Yes, I just finished.”

I step up beside you, so you look up at me.

“Finish?” I ask and rub the back of my head. This is so weird…

“Mhm, I squirted it inside me.”

I nod. “Okay, yeah… I just thought I heard… something. Nevermind.”

That’s when the color of your face changes from pink to a deep shade of red. “Oh God! I was trying to be quiet. I’m so sorry you heard that.”

“It’s okay,” I assure you. “It’s not like any of this is normal anyway.”

“That’s true. But, I need you to know that I only did it to improve the chance of pregnancy.” Oh?

“If you orgasm it helps?”

“It does.” 

"Alright." With my hands in the pockets of my sweatpants, I stand by your bed. There you are, not moving, so my swimmers can do their job.

And then… I spot it. There’s a small hand towel next to you. It looks like there's a sex toy wrapped inside it. I can’t help but ask: “Did you use this to get off?” 

I can feel my cock stir at the idea. You look over and then hide your face in your hands. “Oh my God… I did. In my defense, I thought you’d already left. I also didn’t think you’d come in.”

“I’m sorry, I can leave," I reply quickly, a little flustered. Am I making you uncomfortable?

“Don’t!” you blurt. You stare at me with wide, worried eyes. “Don’t leave.”

“Okay.” I check behind me and find a small stool beside your bedside table. Well, if you want me to stay, I may as well sit... so I do. “You think this is going to work?” I wonder out loud.

“I do, yes. My doctor said something along the lines of… I could have any man’s baby if they were potent.”

I shudder visibly at what you say.

“And you are potent… I mean, you have a daughter.”

Fuck. No one knows… but I have a massive breeding kink. It’s what I get off to on the day-to-day. So what you’re saying is hitting that spot inside my primal brain.

I blow out a breath when I feel my sweatpants lift slightly against my thickening dick. I’m not wearing any underwear. 

“You alright?” you ask softly when you see me shift. 

“Hm? Yeah… yeah.. I’ve just been on edge for the last three days and hearing you come... God.” I sigh and chuckle. “If you need another load, let me know.”

I can feel your eyes on me when I say that. You’re practically staring. “You mean, right now?” 

“Yeah, I could go again.”

When you laugh, I meet your gaze. “You really are the opposite of your brother.”

“How do you mean?”

“Let’s just say… He could happily go without sex for a week or so.”

That blows my mind. I was ready to crawl up the walls of my apartment before I came over here. 

“So…” you start again, a little sheepish. “If you want to give me another deposit, I’d be happy to receive it.” 

Fuck. Me.

I stand and tug on the front of my grey sweatpants to make sure the fabric doesn’t cling to my boner too much. The shape of it is obvious.

“Oh..” The sound you make is one of surprise. “Wow.” 

The way you giggle nervously gets my attention. I was just about to pick up the cup I used before and go to the bathroom, but then… 

“Wow?” I tilt my head at you. 

“Just… it looks quite big, is all.”

I smirk at your comment. “Can you show me your toy?” I ask. You frown but then unwrap it from the towel to let me have a look. It's a thick, beige dildo. Hmm... that's what I thought. “It’s bigger than what you’ve got there.”

“Really!” Your eyes widen as you look between the toy and my crotch. And then… suddenly, you whimper. Such a desperate sound; it makes my dick flex. Holy shit. 

“Can I… no that would be weird. Nevermind, I’m sorry.”

“Can you what?” I challenge you. 

You’re chewing on your bottom lip, cheeks turning crimson. “I was gonna ask if I can see it.”

The idea of showing my brother’s wife my cock makes my skin flush with heat. 

“You wanna see it?” I ask and hook my thumbs in the side of my sweatpants. 

“I…I do.” You nod, unblinking. So I peel down the front of my pants, keeping it close to my body so my dick is angled downward and I can slowly reveal its size.

Inch by inch… I show you my hefty cock, uncut, a bit longer than average but definitely thicker than average. As thick as your wrist. And bigger than your toy. Your lips part when you see it spring up and bounce once the fabric slides off. My big balls hang low in my sac, ready to draw up against my shaft to give you another load.

“Yep.” You suddenly laugh. “So different from your brother.” 

Holy shit… why does that turn me on so much?

I chuckle and then reach for the cup on the bedside table. Now that you’ve seen it… I can make my contribution. 

“Um, you know,” you speak up as I’m about to pull my pants back up to go to the bathroom. “I mean—“ you pause like you’re thinking over what you’ll say next. “The chances of getting pregnant are higher the natural way…”

Wait. What.

“You want me to fuck you?” I ask, a little stunned. I remember how you dismissed it when I asked you last week.

“It would be better if your load was planted even deeper than how I could do it with the syringe and my toy, yeah.”

So you are asking me to fuck you.

Jesus. 

But… “Okay.” I'm too horny to care at this point. Besides, for how my brother has treated me all my life...he deserves this.

I take off my shirt and then slide down my pants all the way. Socks off too. Butt naked, I stand in front of you. I’m a stocky guy, with big arms, wide shoulders, and a little bit of a belly, but not too much. I have the body of a working man in his thirties. You can’t stop looking at me when I get on the bed. 

“You sure?” I ask.

Nodding, you reply, “Yes, I want a baby. No matter what it takes.”

You spread your thighs a little further and then remove the blanket from your lower half. No panties. Your bum is elevated on a thick pillow to help the process along. And then there she is… your bare pussy. A little bit of my seed clings to your folds, white and sticky. The image in front of me is obscene. You’re still wearing a top and your bra, and since this is just … a breeding, I doubt I’ll get to see your tits. Fine by me.

“You have a great body,” you whisper as I position myself between your legs. 

“Thanks… you ready?”

“Mhm.” Your next inhale makes your chest rise. You close your eyes and rest your hands beside your head on the pillow. 

I use my thumb to angle my cock down, lining us up. Your folds are silky wet and warm. I set myself between them before I place my hands next to your body to steady myself. With a tilt of my hips, I push forward.

Your eyes snap open immediately. “Oh God,” you cry as soon as I try and breach your entrance. You stare up at me. “Jesus. Give me a moment to adjust. Fuck.” I do what you ask of me. I stay right there, at your folds, waiting for you to breathe through the initial discomfort.

"Alright, okay. Yeah." So I start again. I add more pressure until an elongated whimper rolls over your lips. Slowly but surely your folds are surrendering. Quick puffs of air escape your lips as you’re trying to steady your breathing. You stare right past me, at the ceiling. And then...there we go, your folds spread open around my girth, welcoming my cockhead in. Welcoming the thick instrusion. A new intrusion.

“Oh.” You moan long and loud before you suddenly laugh deliriously. “Now I know who’s the bigger brother…"

Oh my fucking God. That does my head in.

I can't stop myself; I have to shove my hips forward to penetrate you halfway at once. The high-pitched cry rolls into a whiny whimper. You stare at me in shock and grab onto my arms beside you. The way you look at me though...that's pure lust. You want this. I can see it in your eyes. Your pussy is tight like a vice, clenching around my shaft, so whenever I pump in, I am stretching you open. I wonder why my brother’s wife is still tight like this… my wife wouldn’t be if I fucked her multiple times a week.

In and out, in and out… and then a longer, more determined push inside. You press your lips together whenever I thrust deeper inside you. I’m fucking you open. Literally. You wanted me to plant my seed as deep as possible… so that’s what I’ll do.

When I look down between us, I see that your pussy is clinging around my cock, wide open, creamy… and smooth. Some of my seed has left white streaks on my shaft too. The sight is insanely hot. 

I drop down onto my elbows, so I can force all of my dick inside you. One inch left. Let’s stuff it in. I hit my hips forward and then shift them from side to side to really go all the way inside you. Until my balls rest against your warm pussy. 

You cry out and dig your nails into my shoulders, holding on tight, legs lifted beside your body. 

God, you feel good. All hot and creamy, velvety smooth. I start fucking you for real. I know this won’t take long… especially now that I’m at your cervix. I hit it at every stroke. And every time I do, you give out a little yelp. I never thought I’d hear you make such sounds. 

Tiny. Little. Yelps. Whenever my cockhead hits your cervix. 

“Fuck, that’s deep, oh my God!” I grab the underside of your thighs to push them into mating press. The position has that name for a reason. As soon as I move you, your eyes widen in surprise. 

“Oh shit!” Fuck, yeah, that’s perfect. I hold you there… my helpless sister-in-law. I’m so in my zone that I don’t realize what’s happening when your legs start to tremble and your pussy contracts around my dick. 

“I’m coming,” you grit out, eyes squeezed shut, nails digging into my skin. You can’t stop even if you tried. Your toes point, thighs shake, calves tense and tremble at the same time. It’s a sight to be seen. You stare up at me when I relentlessly keep fucking you through your orgasm. Your pussy is drawing in my previous load, needy for another.

God, I don’t want this to stop. I’m fucking you into submission… my sister-in-law who wants me to give her a baby. To get back at my useless older brother. 

Fuck!

Deep, primal grunts reverberate from my chest as I speed up my thrusts. “I can’t stop!” you cry. You’re still orgasming around me. I hit your deepest part over and over again. The sounds you make sound almost painful. I’m losing myself to pleasure, to lust, when I start to drill into you harder for the final stretch. I can barely hear you cry and sob and moan; it feels like I’m underwater.

I’m gonna give you a baby. I’m gonna knock you up. And my brother will pay for that kid. He will father a child that isn’t his. And he will never know.

That thought does it.

I grab your thighs harder while my hips move of their own accord. Faster-faster-faster. Until I reach that high. Until I reach my peak. With my balls tight like a fist against my shaft, my throat strains as I growl the deepest sound… Right then, my seed shoots up from deep inside my balls, pumping rope after rope against your ripe cervix.

Your pussy is still clenching, legs still shaking with aftershocks when…. Another orgasmic wave rolls through you. I can’t help but watch your face. Eyebrows pulled together.

“I’m—“ you start and then whimper the most submissive sound. “I’m making a baby. I’m making a baby.” You chant like you know that’s what’s happening right now. 

My swimmers are invading your egg. Popping that barrier. At least one of them will be strong and fast enough to breach it. You finally open your eyes to look up at me. And I swear I can see it. How your pupils dilate when that one swimmer burrows itself inside your egg. Cracks it. A critical hit. You’ll make a baby. Your brother-in-law's baby. 

My sperm made my brother’s kid. And he will never know it.