Your pants feel tight!

You undo your belt and pull down your pants as they grow too tight. Your underwear rides up your crack as your ass swells.

“Now *that* is ready to be stuffed,” Cokko admires as her cock hardens. “The pre and cum have chems that will make this smooth.”

“You have a huge cock, Cokko,” you compliment back. Her shaft swells as thick as her hips are wide, and your eyes go wide as the head flares. You turn around; you can’t bear to see how big she is getting.

“Look at it, see how wide I am going to stretch that ass...” You watch her cock reach full size, and then aim it. “Going to slide that thong down?”

You slide your underwear down, and as you reach to pull it off your feet, the wet head nestles between your cheeks. It feels great, but it doesn’t get very far. You overcome your suprise and relax, and it burrows deeper, parting your now quite bulbous ass.

“We won’t rush, this may take a few applications,” Cokko informs you.