"I was never very clear on what people meant by "exploring my sexuality" before".
Its awesome, isn't it?
Just keep in mind that your W is also exploring hers. She doesn't necessarily "know" what she will like and what she wont. She likely never really thought she would want you to dominate or lead her. She probably thought that she just "wasn't into it" but she didn't have thoughts like "but if only he would do x, y, z I might get into it". She and you both are getting to go through those thoughts now and test them out. So now that she is getting a little bit of fun and pleasure out of you dominating a little and leading more, she is just now being open to those feelings. The look on her face you described, was new to her, too. She likely has never really felt that before. Its all very exciting and I'm very happy for you two.
