Squirm she does, she can't really control herself because that slow pace is driving her a little wild. It's just enough to make her writhe and moan, but not enough to really build toward anything so she's just trapped in pleasure.

She loves it, of course, but she can't stop her body from begging for more.

She wants to say something in response to his words, but can't quite come up with something coherent enough to be worth saying, so it all just ends up being a series of gasps, moans and whimpers.