Author's note: Just to help everyone keep track of our heroes:
Michael is the half-alien super stud that can create super women by planting his seed in them
Mandy, Michael's first creation, has unlimited strength and invulnerability
Rachel, his 2nd, has magical hair that is unbreakable and can act as tentacles, a shield, projectiles... and boobs that can squirt milk bombs
Amanda is able to shoot blasts of energy from her eyes... and can fly.
Lynn: Mandy's Mom - gang bang superstar - in the process of awakening her powers.
Amy: Rachel's BFF, recently converted to "save" her from Firm mind control. Able to discharge healing and augmentative nanites from her tits, body control ability, absorbs organic material to increase her powers.
Lena: Amanda's sister, willingly joined the band - fuck a stud for superpowers, why not?! Can cut through space time to create teleportation portals.
[Lynn]
The Bull grunted loudly as he came inside Lynn, his cock sliding in and out of her dripping pussy like a piston. Lynn could feel the hot spurts of his cum globs splattering against the base of her cunt.
Her own pleasure was overflowing. As much as her mind absolutely hated being used as the Bull's fuck toy, her body responded automatically to the physiological stimuli - a barrage of tactile and hormonal stimulation that commanded her body to orgasm. And the blasts of sperm inside her cunt pushed her over the edge once again.
"Ahhhhhh! Ahhh! Ahhhhhh! God.... Ahhhhh.... Ummmmm.... Ahhhh!" she screamed, eyes rolling back in their sockets, every muscle in her body in spasm. Her arms and legs jerked against the binds of the chair, while she whipped her head back and forth as if in fits. She felt as if hot pleasure had seeped into every part of her body, pulsating in concert with the Bull's cock thrusts. Lynn moaned and gasped for breath.
"Haha... You really like me fucking you don't you?" chuckled the Bull. He grunted contentedly as his cock squirted the last few globs of cum into Lynn's pussy, then his right hand grasping the base of his cock he withdrew from her and slapped the dripping cock head on her pubic mound in satisfaction.
Lynn's orgasm slowly faded and her vision and self control returned. She was still gasping for breath, and some of her muscles were cramping painfully, but she knew the worst - or best, depending on your perspective - had passed.
The Bull had finished slapping most of his cum and Lynn's pussy juices off his cock and was starting to turn away. This had been his 3rd cum dump in Lynn this session and he typically would unload 3-4 times in her before wondering off to take a break to recover and then fucking some other poor slave.
A surge of lust from her groin caused Lynn to moan loudly and squirmed in her harness. The Bull glanced back at Lynn over his shoulder. He had expected her to have passed out after the most recent fucking and was pleasantly surprised to find her still conscious. Lynn kept up the pretense of being a stoned sex slave and continued to moan softly whilst grinding her hips, jerking her pelvis in fucking motions every so often.
"Oh...! Looks like you still want more fucking! I haven't put my cock in your mouth today, thanks for reminding me... Now I throat fuck you good!" mumbled the Bull gleefully as he strolled over towards Lynn's head.
The chairs all had mechanisms that allowed them to be adjusted so that the Bull could fuck his toys in whatever manner he desired. He now adjusted the chair to recline, lowering Lynn's head and tilting it back such that her face was now at the same height as his cock, perfect for him to use Lynn's mouth as a pussy.
Omigod, he's going to put his cock in my throat again...! Fuck! I hate him! I hate his cock! I hate him! I'm going to kill him!
The Bull wasted no time and began pressing the base of his balls and cock against Lynn's inverted face. His musk and the contact of his cum and sweat covered groin immediately triggered Lynn to involuntarily begin licking and sucking. She groped and licked with her mouth and tongue, as if desperate to taste and feel the Bull's balls in her mouth.
Lynn hated herself for her reaction to her captor. But no matter how her mind rejected it, her body craved him with abandon and every time she managed to lick and suck at his balls, she would be rewarded with a throb of pleasure bubbling up from her groin. She just had to endure the humiliation and subjugation for a few more minutes and revenge would be hers.
Lynn's licking and sucking had returned the Bull's huge cock to its full erect glory. Taking it in his right hand, the Bull aimed his cock at Lynn's lips. The moment his glans touched her lips, Lynn opened her mouth wide and hungrily sucked his cock in.
"Ooooh.... Mmmm... That nice... Me gonna use your mouth like a pussy..." grunted the Bull. He grabbed Lynn's big breasts with both hands, like the handlebars of a bike, and began riding her face, cock thrusting deep into her throat.
Lynn gagged with every thrust. The Bull's huge cock completely blocked her airway. Every time he withdrew, she would desperately gasp for air before the huge meat was shoved back in again. Tears flowed up her forehead as she choked and her face turned red with the blood rushing to her face and the choking.
And yet, her body craved being impaled by his cock. It didn't matter that it could kill her if he left it in her throat too long. Every time the Bull thrust his cock into her mouth and throat, a surge of pleasure would wash over her, gushing out of her groin to envelope her. Every choke was paired with a shudder of pleasure as the muscles in her core, groin and legs tensed up like the beginnings of an orgasm. It was a wicked torture that made her respond with both yearning and disgust.
The Bull grunted with satisfaction. His cock was being enveloped by welcoming lips, tongue and throat. Lynn's mouth and throat felt like exquisite pussy.
"Uh, uh, ugh, uh, ugh, oh, ack, uh, ugh..." went Lynn's throat as the Bull's cock squelched with each thrust, saliva, pre-cum and a bit of bile leaking out of the corners of her mouth.
"That's nice... ohh... mouth feel so good... take it, take it! Oh... I'm gonna cum..." grunted the Bull, hands massaging Lynn's pillow shaped breasts for all they were worth, mashing the soft flesh in his hands.
Lynn's face had started to turn slightly purple with the asphyxiation. The veins on her neck bulged and her eyes had rolled back into their sockets to show only whites. And yet, despite all that, her tongue and lips continued to suck at the Bull's cock, her throat opening up to allow him to go as deep as he wanted.
And then the Bull came. His thrusts became frantic as his orgasm traced a hot path from the base of his balls, up his long cock, to explode deep into Lynn's throat. He continued to pump her mouth non-stop, coaxing out every last drop of cum, savoring the hot pleasure it brought him.