Well, she is an alpha and he put her on top, so unless he tries for otherwise, it's only the natural thought process for her. Though she's not truly stupid enough to think she's completely in charge when playing with someone she doesn't know the strengths of.

She nips gently at the bite mark to pull just a little more blood from it. The eyes she raises to watch him have a shadow shifting through them, something not born from the lights in the room but from inside her. "Now that's not true, occasionally I listen to what people say or want. Just have to be vocal about it." Now she does move remove his pants.