She keeps getting fucked and the guy is about to cum...

Tanya is has stopped bouncing herself hard on the cock and is instead rotating her hips in a corkscrew motion to keep up the wonderful feeling of being penetrated and grind his balls against her pierced clit. Her eyes are starting to roll back in her head. Somehow you can't picture Tanya getting this worked up during any old anonymous fuck session. You think that it must be the fact that Tanya's tasting how wet this scenario is making you and feeling your hands squeeze and knead her gyrating body. You can hear the breathing of the man on the other side of the wall getting quicker and shorter.

It suddenly occurs to you with a guilty thrill like you never knew was possible that, on the off chance Tanya wasn't lying about setting up something so perverse, this is as almost as close as you can come to seeding her yourself. After all, it would be the same genes that made you, still potent and eager after all this time. Tanya was coming very close to pulling a mischievous trick on Mother Nature. You suddenly had a much easier time that Tanya had told the truth, the perversity of getting a family tree to loop back in on itself like that would be just the kind of thing that drove her wild with excitement. But now, you had a possibility to pour your own family's DNA into her.

But Tanya had been dancing very close to the flame all this time, and it seemed almost like a form of poetic justice for her to take a fateful load of semen thanks to the same tendency she had counted on for her plan; that a pent-up middle aged man's cock couldn't tell the difference, nor care, between any anonymous young pussy it could thrust itself into. With Tanya's talk, and after your experience being seeded while tied down in her bed, you could suspect that whoever it was on the other side of that gloryhole had a voice in the back of their mind telling them to let nature take its course.... just like you'd heard that deep-seated urge while you got taken unprotected for the first time. The memory of that feeling combined with Tanya's tongue made you give a gasp of excitement - which, you hoped, wasn't too much of a giveaway as to your identity.

Now it was time to have a little fun and seal the deal. You clamped your fingers tightly over your nose and clenched your throat to make your voice an unpleasant (although undeniably slutty) nasal squawk of a voice instead of your usual sweetness. "Hey there mister... oh your cock was so big." You push Tanya away from your crotch and wriggle under her to take hold of her hips, blocking her from getting away with your shoulders, and talk to the hole instead. "I can feel it throbbing," you say, running your hand over where Tanya's pussy has the stranger's tight balls pushed up against her crotch, penetrating her down to the base.

"Eheheheheee. I think it's saying something: 'I want to shoot a giant load of cum in the womb of this slutty punk-rock girl half my age.' One of the reasons she's so horny is because she's ovulating today, but she never takes any birth control because the element of risk makes her come harder. If you could see more of her than her slutty cunt you'd want to make her take that risk even more. She's got huge DD-size boobs that are perky even when she's not wearing a bra. Her hair is short like a boy's and all brightly dyed and spiked up, and she's got a nose stud, plus dresses in slutty curve-hugging outfits every day so that everyone can see how wild she is and wants to go along with her nasty schemes."

Tanya is starting to look every so slightly worried now, blushing, she looks down at you and starts to say something, but you shut her up with a smoldering hiss and another stroke of her clit with your finger. "Ff-fuck, Princess... are you really going to... do this..." she moans in a low voice as she hovers on the edge of orgasm, just a few hard thrusts and flicks away.

You give her a girlish little shrug and go back to the hole. "Oh, she's just about to cum all over your potent cock, I can feel it. She loves to drag me into risky anonymous sex, I'm sure that she'll get so into punishing me for this that she forgets all about protecting herself from all the sperm you'd leave in her. I promise that I'll distract her so thoroughly that she never makes it to taking the morning after pill."

From the other side you hear a voice that makes your decision for you. "Oh shit... It's... damn hard not to blow when I'm balls deep in a girl the same age as my daughter's friends..." Tanya gives a little gasp, and looks down at you; you reply with an evil wink. Tanya gulps and looks over her shoulder at the gloryhole - completely hidden by her hips grinding against it, and tries to speak despite the feeling of you licking her breasts again. "Hey..." Tanya says, "Don't you want to... enjoy this natural redhead here..? I don't mind you enjoying the ride but, mmmmf, don't listen to her, give a knock on the wall when you're getting too close so I can switch out with her, okay?"

This is it; you're giddy with excitement, but also feel an oncoming wave of guilt. Do you really want the chick you're truly in love with to get a repeat performance of the day that led to you and Jamie, except a lot sleazier and more anonymous?