Well, the smirk against his lips said something for sure. And the little hum. And if he kept at it, it wasn't going to take much at all for that nipple to begin becoming more of a peak.

So yeah, it worked.

Harley gave his hand another squeeze, and then hers slid away. She needed it elsewhere: namely, for sliding onto the leg he had between hers. Not to stop him from doing what he was doing, but rather to make it more of a... mutual effort.

Meaning that gripping his thigh gave her an anchor for grinding against it every time he moved, hips canting upward to meet it yet more firmly.