Only once she's succumbed

"Beg me," you taunt crueely, smearing your phallus knob with Sister Mary's meandering sex juices, teasing her with real penetration. An evildoer's dick. A sinful transgression against her sacred vows. "Beg me like you’d beg Jesus, or one of those Crusader Templars to fuck you."

Maybe it was the Lord‘s name, maybe it was the momentary sensation of being filled again after so long, but Sister Mary pops her eyes wide open and began to really ask for the dicking that was coming.

"Please fuck me, please. Please, please fuck me."

" 'Fuck me like a slut'. Say it," you feed her some lines, moving your hands away from her neck. You can control her entirely from the hips at this point.

"Fuck me like a slut. Please. I’m just a slut. I’m ---- AAAAHHHHH!"

You slam your dick into the root, pushing your weight down to force your erection into Sister Mary’s wet, but insanely tight, insides. Her body jolts up with a lurch, and you grab two fistfuls of her thick backside to keep her in place while you ram hips forward, savagely sinking another inch of your erection into her sanctimonious fuck hole.

Sister Mary’s eyes remain wide open, her white teeth bared and perspiration running down her cute little nose as the sensation of being fucked by a man who cares nothing for her possesses her body once more, like when she was younger, like when she was a good little slut. She shutters, biting her lip to stifle what is probably a non-consensually induced orgasm.