His hand tightens on her breast when she tips her head back, having it fall back on his shoulder.

"Too... what?"

He breaths deeply, his cock filling up with blood and hardening against her, stimulated by the way she's rubbing herself against him.

"It's fine... perfect. You're perfect."

Fast and eager, yes, but he loves it. Loves it far too much to want it to stop, or even ask her to slow down - and unless he feels danger coming on, he's not going to.