Eileen climbed back atop Ty and kissed his young lover, pulling her upright to prep her for a new position. Before he did, however, he decided to share a bit of dirty talk he'd thought of- he wasn't sure if it was true, but he felt like it'd turn on Ty.
"I think I've worked out why we can't stop mating and making babies," he said.
"Wh-why?" Ty replied breathlessly.
"Because these bodies exist to mate," Eileen purred, his shaft sliding down Ty's stomach and crotch. "This phallus was formed for me to fill you, and the testicles inside me were formed to produce countless sperm to fertilize you." He felt Ty shiver under him, and continued, "This slit was formed for me to ejaculate in, and the womb inside you was formed for our litters to get conceived and grow in."
Ty had gotten bred too many times to be sure if Eileen was right, but his words definitely felt right to her. She felt a sense of wondrous purpose in bearing his offspring over and over, and his defeminization and her emasculation seemed like fate. Recalling her lover's handsome muscles and penis and testicles emerging, and her breasts sprouting and vagina and clitoris forming from his inferior manhood, felt like a rapture.
"Mate me more, then," she demanded. "I've gotta have my stud mount me and pump his seed inside me so I can give him another caboclo litter!"
"That's right," Eileen agreed. "And I have to pleasure my fertile paxião with my big thick cock and then fill her with my essence and make her pregnant with my offspring."
Once he finished his tantalizingly long sentence, something else tantalizingly long spread Ty's pussy lips open and made her moan as it filled her up. His hips pulled back and then thrust hard at her, his balls slapping her crotch loudly and firmly and his treasure trail stroking her smooth skin. His thrusts grew faster and harder rapidly, as did his groans and her whimpers of pleasure.
Ty's heart raced as she stared at Eileen's handsome body above her, seeing his chest muscles shift and his shaft slide in and out of her. Her breasts bounced and her body shook with every thrust of his, she felt under the control of his masculine instincts. Not that she objected to that, she knew how intense male desire felt, and she preferred how it felt to be female and have her desires satisfied by a man.
One of Eileen's hands moved from holding Ty down to playing with her breast, and the young woman cried out in surprise as the firm, dark hand pinched her nipple and made it lactate. It amazed her how far gone she was from the boy he had been- to think he used to milk himself imagining cumming in Eileen's womb! That seemed absurd, he made a way better man than Ty had. Now she had a womb which he filled with his thick seed, making his babies from her eggs, and this way round came way more naturally.
Ty's eyes met Eileen's, imposing and deep brown, and she felt them bore into her as he said, "I'm close... ovulate for me..."
Her body did as he asked before she could tell it to. She felt her ovaries stir and scores of eggs emerge from them, and she could tell Eileen had had a vision of it too, because he pushed her into a mating press and thrust as fast and hard as he could, not letting up from chasing his peak for a moment.
She heard him pant and grunt into her ear and felt his cock head and testicles twitch as his semen was pumped inside her, and her own orgasm took hold as she clenched tightly around him and her cervix dilated for his cum to flow in.
His unyielding sperm soon found her freshly formed ova, pounded into each one and made them all capitulate and get fertilized. They settled into her womb and the young woman was impregnated yet again.