First bitch

Mark continues to push down, his transformation continuing as he humps the cock inside him. The Martian below grabs Mark's new, curvier hips, using his arms to thrust him up and down like a human fleshlight. The former man bounces on the cock, taking it all the way to the hilt, before being lifted off despite his labia's attempts to hold on to that thick shaft.

He's screaming in a mix of fear and feminine delight, the higher pitched sound betraying how his gender has changed. "Oh God! Oh God! More, more, please! I want more!" His nipples perk up as his chest begins to swell.

Alpha chuckles. "Ahhhh! You can hear that mental switch flip as she stops imaging herself as the man. The bitching is almost complete; see how she's already got the mind of an eager slut!" His focus shifts back to the other two men still waiting to be turned. "Which of you will be next?"

Chad is shaking. His muscular body is trembling, as he fights to keep from succumbing to the urges that overwhelmed Mark. He's realizing he may be soon experiencing the same fate as Mark. You feel a horror that this could happen to you, yet your body seems to be responding as well. You just don't know how much longer you can hold out against the primal urge to be fucked.

Chad's shaking body is a testament to the struggle within him. He grinds his teeth and clenches his fists, a snarl twisting his face. "I'll never give in! I'm a man, and you'll never turn me into one of your sluts!" He clearly believes his sheer willpower will keep him from Mark's fate, unaware of the changes already happening to his own body.

The Martians cackle at his defiance. "Oh, you'll be giving in before too long. It's inevitable. You are but a weak human male your pitiful masculinity instinctively retreats when faced by true masculine power." Alpha leans in close, grinning. "Already that pretty face of yours is softening, becoming more feminine by the second."

At the mention of his face, Chad frantically raises a hand to touch his cheeks, a shocked expression on his now more delicate features. Indeed, his strong jawline is already starting to recede, and his nose is becoming smaller and more delicate. He attempts to deny the changes, but his voice has taken on a higher pitch that hints at the truth.

Meanwhile, Mark's transformation is almost complete. His breasts have grown to a generous size, and his formerly flat chest now has the soft curves of a woman. As the Martian below him continues to pump his hips, Mark rides the cock, moving in time with it despite his protests. His labia open to expose the invading shaft, glistening with the secretions of a hungry, needy cunt.

"Oh God, yes! I love it, I love it!" Mark screams as his body explodes in waves of pleasure. His eyes roll back in blissful ecstasy, his voice now a high-pitched whine. The other Martians howl in delight, praising their brother for producing such a perfect slut. Mark's slick cunt spasms and clenches on the alien cock, rewarding the Martian for his efforts.

Alpha's cheers. "Looks like we have a new contender for best bitcher around. Round two will go to whoever impregnates their breeder with the most spawn."