As she looked at her female body in the mirror, Ty pictured how Eileen had looked as a man in her head. Fuck, he had been handsome. Those large firm abs, strong arms and legs, and big thick cock that had filled her up... Ty felt like Eileen made a better guy than he had. Her body was responding eagerly to the memories; she felt her nipples and clitoris become hard, and her vagina moistened with feminine juices.
Ty realized just what she wanted to do- she wanted to try playing with herself. She wished no one would notice or care how loudly she moaned just as a precaution, and then dived into her bed and pulled out her phone. She went looking for porn of handsome men, indulging in her newfound sexual interest in them. She felt transfixed by the handsome bodies she saw, especially their firm arms that could hold her down and their large penises that could fuck her.
Setting her phone down, she eagerly began to touch herself. One hand moved to her chest and kneaded the soft flesh of her breast, and she breathed heavily as she imagined a guy grasping and kissing it. The other reached down between her legs and teased along the moistened entrance to her pussy, while her thumb carefully stroked the sensitive nub of her clitoris.
Soon she didn't even feel the need to look at the porn anymore- she shut her eyes and mental images of all kinds of sex raced through her mind. She saw herself sucking a handsome man's cock and gazing at his horny expression as he thrusted his hips against her mouth. She imagined a guy eating her out, her legs spread and someone between her legs licking up her moist pussy. She pictured herself riding a cock, balancing herself atop a cute guy as she thrusted onto his shaft over and over and her breasts bounced tantalizingly in front of his eyes. Lastly and most dramatic of all, she imagined being surrounded by boys, almost too many to count. There was one holding her head up and pounding his cock into her mouth, one thrusting his cock between her tits, one above her fucking her pussy, one under her fucking her ass, even some standing to one side who were jerking off over her just trying to cover her body in their semen.
As her orgasm drew close enough to be unstoppable, she came to a realization she couldn't avoid. She liked boys. Boys were handsome, firm, hot and could make her feel pleasure beyond her wildest dreams if she and they wanted it- or if he and they wanted it, Ty's own gender didn't seem to affect this desire anymore. But, she realized, it felt like it suited Ty better to be a girl than a boy. She felt more pleasure, and taking this role in sex felt more natural. The instinctive doubt she had had having been a boy who was emasculated to become a girl instead of a girl from the start felt nullified from how much she preferred female sexuality to male.
Practically in response to this self-acceptance, Ty came. In her mind she saw and felt the boys all around her reach their own peaks. She moaned with pleasure, and could almost hear those boys groan and grunt as her body made them orgasm. Thick white seed shot into her mouth, over her chest and stomach, and deep into her ass, but most important of all it flowed inside her pussy. Her inner walls pulsed as she imagined his seed finding her egg and fertilizing it, making her pregnant.
The fantasies gradually faded and Ty gasped for air as she came down from the intense high of her orgasm. She hadn't realized quite how much of a fixation she had with boys or with breeding, not that she was complaining given how nice it felt. She guessed it must come from her experiences with Eileen, or from the fact that she was still unused to a female body and more ensnared by its instincts, kinda like how when he'd started puberty as a boy the instincts he had developed then had been irresistible.
But what mattered most was that playing with herself had felt indescribably amazing, and had given her some more ideas for how to use her powers...