She smirked at you, but did indeed start to thrust in and out of you. Nice and slow. And... And it was feeling good. This was very different to stroking off, but it was feeling good. The fact that it was a big cock still seemed to mess with you, making you more aroused, more horny, and feeling better with each plunge she made. In fact, soon you were starting to thrust and roll your hips back do, meaning she was no longer the only one doing the moving.
"Enjoying your first cock?" She asks with a chuckle as she leans over you, her breasts pressing into your back.