Fist you

"I'm going to fist you."

Her perfectly plucked brows lift even higher. She then lies back.

"Go ahead then."

There doesn't seem to be the greatest enthusiasm in her voice but you've got all the consent you need. You rub your fingers together and really coat your hand in the slimy gel, then lower yourself and slide your pointer and middle finger inside Gwyneth's cunt. She looks up between her legs at you in surprise.

"I thought you were going to fist me."

You were going to warm her up and play with her, but game on. Besides, training sessions are only meant to last an hour so you may as well get a wriggle on. And in. You withdraw your fingers, clench your fist and guide it into Gwyneth's waiting fuckhole. She's already pretty lubricated from previous activities but the lube is definitely reducing the resistance. You slightly unclench your fist and feel Gwyneth jump. Then you start to slowly withdraw your hand. As your wrist emerges you thrust your fist back in, making Gwyneth lurch again. You start to move back and forth, enjoying the spasms and jerks. You thrust your fist past the wrist and then start to rotate.

"Oh fuck!"

The expletive bursts out of Gwyneth's mouth. You continue, back and forth, in and out, round just a little, sometimes withdrawing far enough that your thumb knuckle tastes cool air, other times just slightly. Gwyneth's fingers scrabble at the gym mat beneath her, clearly enjoying this. Your cock is aching and Gwyneth's moans and motions suggest she could be approaching climax.