As she kisses him, her hips find rhythm with his fingers and the leg hooked over his hip gives her a decent range of motion. It doesn't take long before the slow pace speeds up. She isn't sure who is driving it, but more than likely it's her. Under the power of his fingers, she's lost all coherent thought aside from "yes" and "good" and "more."

In fact, it's possible she's even saying those things out loud and doesn't even realize it.

HIs groan reverberates through her own body and she whimpers in return