Sam bit down on her lip in the sultriest of ways and her eyes flew open almost pleading. She let go of her lip and whined low in the back of her throat. My hands framed her face as I shook my head. She seemed to be delirious. Consent was hazy at best by this point.
She sucked in a deep breath and I watched tears well up in the corner of her eyes. She ground her hips against my cock whining pitifully. As soon as her hand reached between us, she felt my cock and urgency was displayed on her features.
She took a deep breath and looked into my eyes. "I know exactly what's wrong with me. I was on Olduvai long enough. I want your cock. I also know that by the end of this your going to knot me. Most importantly I am aware that since a single woman with no sexual partners doesn't bother with birth control, we will be producing the first creature with the 24th chromosome born in hundreds of years. Now that we are in the full range of consent fuck me or get the fuck out." She hissed.
I was hard through her whole explanation and I could feel said knot causing extra pressure under my sweatpants. I fished my cock out of my pants and hooked her legs over my thighs. I looked at her and flipped the gown up. Her outer pussy lips looked puffy and the inner lips seemed swollen. Her clit stood out from under its hood angrily and her cunt leaked thick, cloudy, lilac scented cum.
I rubbed my thumb over her clit as I explored the sensations of my knot. My hips kept jerking of their own accord and a few passes of my thumb sent Sam into a surprise orgasm. More liquid soaked the bed and I pulled my pants off and lined up with her hole. "Last chance, Sam." I croaked.
She glared at me and used the strength of her thighs to push her up on top of my lap. After that she pushed me down and I was now laying on my back. In the next second she sat on my cock and slowly impaled herself. My back arched and she let out a scream of relief so inhuman, that it was below their threshold of hearing.
I grabbed her hips and with a growl I started to grind my length into her. Her eyes were closed and as she rode me I could feel my knot swelling. I could feel it pushing in and out of her outer lips. "John. Fuck. Harder. It needs to catch." She gasps as she braces herself against my thighs. At this point we are reduced to the rough grinding of our sexes. I could feel her cunt trying to pop my knot.
"Fuck. Please." She whines as she bucks against me wildly. The width is too big to get inside of Sam now. I'm sure of it.
"Hon we're gonna have to turn."
"No!" Her eyes fly open and she lifts herself up, slamming herself down with a silent scream as she forces the large knot past her pelvic opening.
"Shit!" She rips my orgasm out of me as I plow my knot deeper into her.
"Fuck! Yes! Deeper!" She whines and I feel her fluid gush around my cock. My knot locks me inside of her vaginal opening.
"Samantha." I moan as I feel my cock swelling and then bursting with each shot I pour into her. She rocks on my cock in a daze as the swells abate slowly. I shutter and roll my hips under her.
"Alpha." She slurs. I look at her in surprise and she falls on top of me with the knot still locked in. I maneuver her so that shes laying on her side if anyone comes in. I throw a blanket over us and watch Sam sleep as I ponder how our relationship is gonna change.