Eileen lay atop Ty as he recovered from his orgasm, holding himself up just enough to not crush her, but still right atop the young woman whose virginity he had just taken. The sense of satisfaction he felt at his first male orgasm was indescribable, especially having been able to pump it inside Ty.
Ty felt just as overwhelmed while she drank in Eileen's intense masculine scent and felt his firm, dark body pressing against her. Unlike Eileen, whose mind was pretty much blank from the high of cumming, she noticed his excess ejaculate oozing from her, and felt acutely aware of how they had changed. He felt weirdly aroused to recall how he'd castrated and emasculated himself, how she became a girl for this handsome man to fuck. She felt more right like this than he had ever felt.
To think he'd rubbed that out of himself countless times, imagining getting to fill a girl with it, and instead, a man had filled her with it. And naturally, now she was a girl, and she'd gotten filled up with cum...
She saw what was occurring in the depths of her body. Countless energetic sperm swam through her, having seeped into her body through her lover's cum. And in contrast to his seed, which had been held inside him until he'd pleasured himself, Eileen's seed seemed to move with instinctual purpose. Maybe it was her imagination, but it felt like they were reminding her he made a superior male to the boy he'd been.
They soon approached what they had sensed inside her. Ty saw a seemingly huge egg, realizing her ovaries had released it when they formed. Eileen's sperm surged toward it and set about chewing away at its outer walls, desperate to fertilize it and imprint itself on their offspring. They unyieldingly wore through it until one managed to reach inside the egg and fertilize it, at which point it slowly moved down from near her ovary into her womb.
It implanted itself there comfortably, and Ty realized, she had just gotten impregnated. She felt a weirdly deepened sense of intimacy with Eileen- he'd made a baby with her...