Ty realized something as she looked at Eileen's hard cock: since until a few minutes ago he'd been a woman, he'd never used it to impregnate someone. And... his body... her body... oh shit... Ty realized she was getting wet.
She leaned into Eileen, trying to hide her nervous feelings behind brattiness, and purred, "How'd you like to breed me?"
In response, a dark hand suddenly reached for her slim neck. "I'd love that," Eileen replied, and his hand moved down to hers, taking hold of it. He and Ty got up from the couch and found space on the floor, where Ty lay back, her heart racing.
Eileen knelt above her, and Ty saw him smile kindly as he held his cock in one hand and positioned himself. "By the way, as someone who's experienced this before, try not to worry," he said softly, leaning in and kissing Ty's forehead. "As long as the guy doesn't go too rough, it feels amazing."
Ty shakily spread her legs, peering over her totally different-looking body surprised at how all this looked and felt. Eileen shifted his cock downwards and rubbed over her moist lips, and she breathed in steadily. When his head slid inside her, she bit her lip as her body was breached for the first time, surprised at how pleasant his throbbing hardness felt as he held himself steady on his hands and how handsome the man atop her looked. Slowly his shaft moved further inside her, and she felt herself stretch to accompany him, his steady but firm motions feeling amazing. Soon Eileen was inside her, down to the balls, and the two lay connected for a few seconds, Eileen stroking her nipple.
They looked at each other with expressions of surprise at the unfamiliar feelings, and Eileen asked, "Are you OK?"
"Yeah," Ty breathed. "This feels really weird and really good. What about you?"
"Same," panted Eileen. "But... I really want to move. My body's screaming at me to pound you."
"Well... I think I want that too," Ty admitted. "You can move." Eileen kissed her head as she said that, and quickly started to thrust in and out of her, hard. Ty was surprised how comfortably she'd adapted to this- the big thick warm shaft filled her and left her feeling in need of filling, his arms held her down, and his balls slapped her body as if to remind her what she'd given up, and all of it felt amazing.
It felt so weird to think about this- that he'd turned the hot MILF next door into a hot DILF, turned himself into a girl, and now instead of filling Eileen with cum as he'd imagined, she was gonna have Eileen cum inside her. But it felt so good, she wanted to see it through. And sure enough, before long his cock was rubbing against her G-spot and edging her towards her climax as he approached his own.
"Ty," Eileen groaned in his deep voice, "I'm- I'm gonna-" and with that he clung tightly to Ty and shot his body's first ever load of semen deep inside her. As her body felt his shaft twitch and thrust inside her and his seed reach her depths, she convulsed in her first female orgasm, her passage clinging to him and her nipples and clitoris practically pulsing with her arousal as Ty moaned eagerly.
They looked at each other surprisedly as they came down from their highs, and kissed eagerly, silently wondering what should follow this both literally and figuratively forbidden lovemaking...