Very interesting concept! A beguiling werefox... very cool! I do have a few thoughts, however. I hope you don't mind my sharing them, from one monster designer to another.
For example the domination is a little easy to recharge. In a large encounter group, she could easily have a party dominated. Perhaps recharge 5, 6? Also, why would she ever be tempted to change form? It seems the only thing she has to gain is loosing powers. When you look at werewolves, for example, each form has an entirely different attack. You seem to have three forms, and three attacks, which is very convenient! Unfortunately, staying in vixen form might be your Fox Woman's best option at all time!
This could be solved easily by splitting the three attacks among the three forms. Longsword for elf, beguile for vixen, bite for fox. That way, there's incentive for the monster to change forms, and separate and interesting strategies.
Keep up the good work!