Female led relationships discussion

Alright - we aren’t your standard D/s pair. She is extremely conventional, with little desire for sex. She doesn’t care much about being a KH, but she’s willing to give it a shot since I asked her to. She isn’t keen on talking about our setup, or even thinking about it that often. I enjoy enforced chastity because it appeals to my kink. While tackling my chore list, I’m usually aroused. I serve as her humble, consenting servant (and the house has never been spotless!) So - I need a pet name that suggests mistress without being too heavy-handed. Goddess is definitely out:-) My lady works well (suggesting I am her knight). I feel Princess and my Queen don’t fit either. Any suggestions? Thanks ahead of time! js