Ty decided it might be best to age them to adulthood for a while so she wouldn't have to nurse two loud screaming babies alone until she saw Eileen again. With that in mind, she wished for the babies to age to 18, and watched them both mature rapidly.
They each grew taller and more developed, with subtle differences in their physiology thanks to the slightly different genes they had come from, and shot through puberty, both developing large muscles, faintly hairy bodies and large penises.
Ty recoiled at noticing the genitalia of her offspring- and to her disgust, found herself intrigued by it. Nope, she said to herself, fucking her own flesh and blood was a line she was not gonna cross. Ew.
Buuuuut... these two guys did have very impressive cocks... it'd be a shame not to...
She decided to meet herself halfway, scrambling their genes so she wasn't their mother. Now she could admire the eye candy without hesitation- and she noticed the two young men were admiring her body too.
"Like what you see, cutie?" one of them said. Ty nodded, and they both sat next to her on the bed, sat her up and kissed her. One went for her lips, the other for her neck, and she heard herself pant and moan at the attention to her body from two different angles.
Her arousal heightened as she felt one boy's cock rubbing against her stomach while the other rubbed her back, and the boy who had been kissing her neck moved up to her ear and whispered, "Who do you want in which hole?"
"I'm not sure she wants one in each hole," the other remarked as he broke off their kiss.
"Good point," the first boy agreed, his precum dripping onto Ty's soft skin. "We know how much she loves to get bred."
Ty's heart raced as the other boy proposed, "What if we both fuck her pussy? Twice as much cum for her to get pregnant by."
Ty whimpered, "Yeah, do it!" and felt both their cocks press together, prise her pussy open and start thrusting in rhythmically. One would push in, the other slid out, a smooth and constant motion that stretched and teased her. She was left moaning mindlessly as her slit was savaged by phalluses.
The two boys' groans and the loud slaps of their bodies as they would thrust at Ty passionately felt wondrous, and she clung to the bedsheets while reveling in the sensation of their warm, firm flesh against her own. She felt like she would just float away into nothingness, and at last she felt her mind go wondrously blank as she hit her peak- and felt warm pulses inside her as the two young men began to ejaculate.
"Wonder how many babies she'll make this time?" one of them said.
"Maybe she should make a litter to fuck her!" the other replied.