Shaking himself out of his aroused haze, Ty said to Eileen, "How's it feel?"
"Nice," Eileen replied in his deep voice. "Really nice." Ty noticed him hesitate, and then Eileen admitted, "But, uh... I do have this weird fantasy I can't shake."
"What's that?" Ty asked.
"I want to breed a girl so bad," the freshly male DILF said.
Ty felt his heart race at those words. The idea of getting fucked by Eileen was more tantalising than anything the boy could possibly imagine, and he felt no hesitation about the idea of becoming a girl to do so. "...how about I be a girl, then?"
Eileen's eyes widened. "Oh fuck, please Ty..."
Ty grinned slyly and he undressed hastily. His T-shirt was thrown to the floor, he dropped his cargo pants and stepped out of his underwear, and both his eyes and Eileen's were glued to his body as he took a deep breath, concentrating on changing his sex.
Ty's masculinity rapidly began to capitulate to the feminine hormones accumulating inside him, and his body gradually reshaped into its opposite. His muscles turned more lithe and petite, his skin smoothed and much of his body hair vanished, and he noticed his hips flare out with flesh while much of the rest of him seemed to be slinking inwards. Gasping in higher pitched tones at the unfamiliar pleasure, he understood what Eileen must've felt when he changed- and it felt so fucking good.
A warmth spread through his chest, and he felt acutely aware of Eileen's transfixed gaze on him as the changes spread there. His nipples swelled and turned sensitive, and large, soft mounds of flesh expanded under them until Ty had developed breasts. He looked down to his newformed tits in amazement, and hearing a rustling, looked up to see Eileen slowly rubbing his large dark manhood. A twinge of arousal shot through him, and even moreso when he noticed Eileen's smile.
"Want it in you?" he breathed.
"So bad," Ty said.
"You'd better lose yours, then," Eileen purred.
Yes, Ty realized, Eileen was right. He'd have to give up his penis for Eileen to get bred. And he- or rather she- was already accepting that. He peered past his tits to see his phallus starting to shrink away, and growing more sensitive as it receded. He felt a sucking sensation at his crotch, and looked up to realize what it had been- he saw Eileen's balls and realized his own had moved up into her body. They reshaped into her ovaries, and his scrotum tucked inwards and split down the middle to form her vaginal slit. Ty's penis soon finished shrinking and formed her clitoris.
As soon as her changes finished, Ty felt Eileen's firm hands cup her cheeks and pull her into a passionate kiss which she eagerly returned. Eileen pushed her carefully to the living room floor, and she felt acutely aware of how much larger he was than her now as he got atop her, his cock rubbing at her smooth stomach.
"You prepared to get bred?" the Brazilian DILF asked her sultrily.
"Fuck yeah," Ty replied in her soft voice.
"Good," Eileen smirked as he slid his shaft downwards, making Ty shiver with anticipation as his head brushed over her clit and along her leaking nether lips. "Cause you've made yourself a perfect fertile female for your papai to fill with his seed!"
Ty felt her lover's large, dark phallus press against her until he slid inside and filled her up, and her fingers and toes clenched and she gasped at the sensation. She felt Eileen's body atop and against and inside her, and he felt irrepressible- but it was too much! If he moved she'd just pass out!
To her relief, instead of moving he tenderly kissed her neck and stroked her hair, comforting her- only to give her more dirty talk. "Don't worry, I know this must be really fucking intense," Eileen whispered. "You've just been castrated, emasculated and feminized- but trust me, once you get comfortable, a woman's body feels so nice."
Ty wasn't sure about that until she felt Eileen carefully cup her breasts and pinch her nipples, making her whine with pleasure, and he reached down to rub her clitoris, making her head go blank. "That feel nice?" Eileen asked, and Ty nodded as best as she could. "Ready for me to move?" Ty hesitated for a second, but then nodded again. "Then it's time for me to put my seed in you," the DILF grinned.
She felt him pull most of the way out, only his head still inside her- and then thrust back inside, his balls slapping her crotch. Intense pleasure raced through Ty as Eileen kept making this motion faster and faster, holding her down and rubbing against sensitive spots deep inside her to make her moan in ecstasy. Her eyes were transfixed by the handsome dark torso before her, and she soon felt herself approaching her peak.
"Ty," Eileen groaned, "you're so good... I'm gonna..." With a loud series of pants, Ty felt his cock throb and his head shoot thick streams of cum deep inside her. She moaned in reply, her body clenching around him to milk as much of his seed from his thick, dark cock as she could muster. Their minds almost went blank with pleasure as they experienced orgasm in their reassigned sexes, and they kissed sloppily as they slowly came down from the high.