Demotion Fetish
Demotion Fetish: Sexual arousal from treating or being treated like someone of lower social status: being treated like a servant in your own home, or being treated like a prostitute by your own spouse.
"I go over to his place, put on this silly maid's uniform, and clean up, even though I have a housekeeper of my own. Being under his domination turns me on -- I guess I have a demotion fetish."