Fuck her ass.

You place your cockhead up against the nurse's tight little asshole and she squirms. "Oh, you know just what I like..."

When you thrust into her, she pushes back, and you spear into her, completely buried. She cries out immediately and starts rocking back and forth, pushing that perfect, round ass back at you and drawing away, eagerly ass-fucking herself with your cock. In no time you establish your own rhythm to which she eagerly submits, hanginh her head down and raising her eager ass up to you to let you get deeper and deeper into her.

"Fuck that ass," she pants. "Fuck it, fuck it hard, oh yeah, hard, nice and fucking hard, fuck it, fuck it, fuck my ass, my tight little ass, fuck it with that big cock oh god so good, so good oh fuck oh fuck oh oh oh-oh-oh-oh OHHH!" She arches, ****-dripping the chair, throwing her head back as her asshole tightens down on you and she cums. She drops back down, spent for the moment, and you begin to pound into her even harder, ramming your shaft into her ass, grabbing her hips for extra leverage while she pants and moans and writhes and starts fucking back at you again.

"Fuck," she moans again, and starts chanting it, faster and faster as your own peak approaches. It seems like she's going to cum with you, and you can tell your own is going to be a powerful one.