"Wait, can you use your power on other people besides you?" Dan asked. Ty nodded, smirking. "Well, since you seemed to have fun being a girl... how about you try turning me into one?"
Ty realised when he suggested that that he'd never actually fucked a girl. He'd had sex as a girl, but had never actually had sex with one. Since Dan was offering, he definitely wanted to rectify that. "OK, let's do it," he agreed.
Dan watched as Ty focused his eyes on him, and he felt an intense tingling spread through him as somehow his body started to reshape itself. His skin softened and became smooth all over, most of his body hair vanishing or thinning. His face resculpted and he heard his voice rise in pitch, the bulge of his larynx vanishing from his throat. His figure sucked inwards from firm thickness to soft curvature, and his muscles turned more lithe and petite, his hands and feet now noticeably more small. He felt his nipples expand and grow more sensitive, and under them soft mounds filled out his chest as mammaries formed. And at last his manhood was turned to womanhood- his penis rapidly receded into his body and his testicles shrank inside him, the sac they had been inside sucking inwards into a mound, until SHE exhaled as she felt her clitoris and vagina finish forming.
Ty looked at Dan- or Dani, as he realised she was now called- in amazement and arousal. Transforming people gave her a weird satisfaction through imposing himself on others' bodies, or in his case, imposing the alternate self that formed from the transformation on his other self. But in Dani's case that was mixed with a deep-seated arousal at how hot he found her.
Likewise, Dani felt amazed and aroused at the change. Nothing he'd ever experienced had felt anything like becoming a woman just now had, and her new body felt so different and so good. To say nothing of how arousing she found Ty right now, the erection he had developed from transforming her protruding between his legs.
The two kissed passionately, and Ty carefully got himself atop Dani, his cock pressing against her stomach. "I wanna fuck you," he breathed between kisses.
"Fuck me, then," Dani demanded in her feminine voice.
How could Ty even try to turn her down? He moved downwards slightly, rubbed his head against her lips and eased inside. It felt indescribable to have her warm wetness wrap around him, and he exhaled in intense satisfaction.
In response, a keening moan escaped Dani's lips. As a boy, he'd had things inside his ass once or twice, but this felt so different- more comfortable, warmer, wetter. The strangeness of penetration as a boy was absent, both for better and for worse, but in any case she loved how this felt.
"Ty," Dani pleaded, "play with my tits."
Ty did as she asked, reaching down to one breast, cupping it and pinching the nipple. Dani moaned eagerly in response, and Ty couldn't hold back his hips any longer- fortunately, she moistened and loosened up around him enough for him to rail her as eagerly as he wanted to.
The two of them kissed passionately, and Ty's thrusting grew faster and more eager. He felt like an animal, his lust insatiable and instinctive, and was just glad Dani's body seemed to respond comfortably to his continued pounding.
Eventually they both peaked, and she moaned and he grunted as his seed pumped inside her, his shaking hands clinging to her breasts and pinching her nipples making it feel satisfying to her too. They huddled up together once again, and wondered whether to sleep or do something more...