Ultraboy bests her!

Nishi moaned as she felt Ultraboy start fucking her like she'd done to so many others, including Ultramom, the difference this time was when Ultraboy came inside her, she'd lose her cock and in all honesty get pregnant as she had been told that whoever came inside her had conquered her and their seed would not only inseminate her but also put her under their control.

Nishi realised quickly that she needed to break free and regain the advantage (if only I hadn't been so arrogant) she thought as she tried desperately to push the young hero off of her. Unfortunately for her, Ultraboy saw what she was trying to do and grabbed her cock to distract her, he started jerking her off making her moan and taking her eyes off the situation.

At that moment, Ultramom woke up and, after catching her bearings, looked down and screamed as she saw what Nishi had done to her.

"Mom, do you want some payback on Nishi?"

"Oh hell yeah I do! What is your idea?"

Ultraboy kept jerking Nishi with his left hand while at the same time, using his right arm to help flip her over, exposing her virgin asshole.

"N-No, d-don't!"

Ultramom grinned an evil grin as she made her way over to the copulating pair, spitting into her hand, she rubbed her cock, getting it as wet as possible (she was still a heroine after all) and started easing it into Nishi's asshole. Nishi wailed as she was double penetrated by the mother and son.

Ultraboy could hear Nishi's breathing starting to get more and more erratic, she was thrusting her cock into his hand, internally she was screaming for this to stop but externally, she knew she was done, they'd beaten her and she cried out as she came for the last time through her cock, the white hot seed splattering Ultraboy's chest before the cock disappeared from his hand.

The two heroes pounded a now fully female Nishi for another twenty minutes before they came simultaneously, filling her bowels and her womb, she passed out as she submitted to her new owners.