I grab Katie by her legs and drag her backward until my cock is almost touching her ass, then I use my fingers to rip a hole in her bodysuit the size of my fist, exposing her asshole completely.
"Are you ready, my dirty little slave?"
"Hmmm. Yes, master…"
"Are you ready for your master to push his cock deep inside your ass and split you apart while you scream in pain?"
"Aahhh… yes, master, fuck your slave's slutty ass! Tear me apart with your mighty cock!"
I slap her ass with force, to which she moans.
"Be a good slut, and your master will show you a new trick."
I spread her buttcheeks with one hand and aim my cock to her already slightly dilated asshole, then I place my cockhead against her anus. I lean forward so my body overshadows her, then with a brutal thrust, I pierce her sphincter while I let my weight drop on her body at the same time, causing my ravaging cock to invade her completely and my balls to rest against her pussy.
"AAH!! IT HURTS! MASTER!"