Before she could, however, Eileen got overcome by arousal at a weird idea. He felt himself getting an erection at it and soon felt like he couldn't hold himself back his desire.
Ty saw Eileen carefully move up to her and felt his cock head rub at her pussy lips, and a mix of surprise and arousal shot through her. "Ei-Eileen!" she whimpered. "I ca-aaahhhn~" she moaned helplessly as her lover's phallus filled her up. Even after having her body stretched so much, he still felt huge inside her.
"S-sorry Ty," Eileen managed to grunt as he slowly pulled back and thrust his hips, his balls pressing against her. "I d-don't want you to stop being p-pregnant."
Ty felt an intense surge of arousal run through her as he said that- intensified by having him thrusting into her, naturally. She knew she couldn't stop him doing this without using her power- and she felt like she didn't want to. There was something intoxicating about having her lover fuck her while she was already full of his children, and especially about being so weighed down with them that she couldn't move.
Eileen decided in his horny, unfocused mood to admit his most reckless, primal desire. "I want to- oh- own you with my cock..." he groaned. "I want to p-populate you with my caboclo babies..."
His words made the girl under him lose her own mind. As his thick shaft and dark balls pounded into her and slapped at her, she felt truly owned by this manhood that had only developed less than an hour ago. It was way larger and firmer and had more fecundity than Ty's own ever had, especially now it took the form of the sensitive nub above her pussy.
Likewise, hearing him beg her to mate her more made her ovaries spring into action, eggs emerging from them hastily as her lover's orgasm drew closer. Once he came panting and grunting to his climax, and his semen shot through Ty's pussy into her womb, the seed swam past the offspring their precursors had made develop and found their own calling. The eggs were set upon by Eileen's seed and countless more caboclo babies were conceived, settling into place alongside their near-birth siblings.