You

Nikki grunts loudly as you slam her tits first on the cold ground and shove you cock inside her asshole. You manage to trap her arms in a full nelson and start thrusting angrily into her hips!

To your surprise, she fights back, squeezing her asscheeks on your shaft while getting back to her knees. She moans aggressively as she starts bouncing on your dick, still trapped in your full nelson.

You can tell she's trying to force you to cum, in an attempt to tire you out.