Your newly-enlarged ass stuffed with his cock

Trying to appear as sexy and aroused as possible, you turn around and push your ass towards Professor Frankenstein. Your newly-enlarged cheeks press against the glass and squeak as you wiggle them from side to side. You look at him over your shoulder, batting your lashes and watching him watch your wiggling peach. You try to come up with nasty things to say to entice him.

"How about a ride up my dirt road, stud?" you ask. "Grab my hips and stuff your dick up my ass. Get your fuckrod up my tail pipe. Don't you want to feel it after all the adjustments?"

Frankenstein licks his lips and seems to consider your offer. After a moment he answers, "No. Much as I'm sure it would feel wonderful, if I am going to claim that body I'd rather not have a sore ass when I do."

You start to try another tactic, but it's too late, he turns the dial on his controls and agonizing bolts of electricity lance through your clit.

"I will finish the transformation," says Frankenstein with a smug grin. Lightning crackles up and down the chamber and burns through your body. You black out as the pain becomes too intense. Just before the darkness swallows you up, you have time to wonder what your fate will be when you awaken.