This is the reason Professional Dommes exist! A lot of women in relationships don't feel comfortable topping their male partners, thus creating the need for a Professional to step in. It can be hard to look at someone you love and slap them in the face and call them a bitch. I hear all the time from subs that they've tried to get their girlfriends or wives to Dominate them, but it was just unnatural to them because of the relationship. So in a sense you're in the same predicament.