Alan walks him and Elena through the master bedroom and into the bathroom, stopping to breathe a bit, trying to calm down. He's probably going to have to wait until morning before he's rewarded with what he's created. Licking Elena's plush lips once again, he concentrates, waking her up and making her think they had just gone to the bathroom.
It's almost painful to just bear the arousal of Elena sliding into bed and pulling against Karie, although Elena seems to pay no attention to it. To her, she's done this many nights, but Alan's mind is abuzz, feeling Elena's massive breasts, pressing against Karie and her, her sexy body pressed against her daughters incredible cock and balls. In the end, Alan does finally drift off to sleep.
The next thing Alan is aware of is an intense pleasure, his new unnatural sensitive pussy, Elena's, being driven into by a hot, massive shaft. Karie pushing her hard cock deep inside them, her hands running over their massive, amazing breasts, kneading them as she thrusts. Alan and Elena's body bursting in orgasm after a few thrusts, each plunge after that rocking another white hot stab of pleasure through their over-sexualized body, Karie's huge balls sliding and slapping against their legs, until his now lover cries out in her own massive orgasm.
Still lost in pleasure, the cum pumps into Alan's shared body, burst after burst of Karie's over-abundance of cum, filling Elena's modified form, her stomach rounding after a few moments and stretching with every gush from Karie's massive cock. Finally, Karie's orgasm ends and she falls onto a pair of massive breasts, nuzzling into the warm cleavage as she pants in relief.
Elena giggles, wordlessly sliding a hand under her assets and lover to feel her rounded belly, Alan muddled from the intense, mind-numbing pleasure of the fucking he just received. The three lay there for a little while, until Karie finally gasps, looking at the clock. “O-ohhh, I gotta get ready for school...” She pushes herself back, shivering as she slides her huge, flaccid cock out of Elena's sex, loosing her cum on the bed.