Strike back!

She moans slightly from the pleasure, not expecting any resistance. It was a mistake on her part. You clench your fist and smash it into her tender pussy, making a squishing sound. Emily yelps in pain and releases your hair at once, stumbling back and griping her hurting crotch. The girl remains standing though; you weren't in the best position to strike so it wasn't as powerful as you hoped.

But at least it gave you the time to recover. You climb back on your legs and face her. She glares at you, still holding her pussy. You will no longer be taken by surprise, so you have an advantage.