They started to move.

Slowly at first, finding a rhythm. When Alex thrust up, Ben pulled back. When Ben drove in, Alex retreated. The opposing motions created a constant friction, a relentless fullness that never stopped. My nerve endings were on fire, every thrust sending shockwaves of pleasure-pain through my core.

"Oh god, oh fuck, oh god—" I chanted mindlessly, my hands fisting in the sheets.

"Feel that?" Ben grunted, his pace increasing. "Feel our cocks rubbing together inside you? Feel how we're stretching you open?"

I did. Oh god, I did. Through that thin internal wall, I could feel them sliding against each other, the friction making them both...