Intro. and his wife were defeated. Bought by a depraved cleric. He puts her above you. The two of you continue to have adventures, but at his house?
You and your wife Kara are adventurers in a medieval fantasy world. You lost a battle, were captured and sold on a slave market. You have been purchased by Efrim, a powerful man who runs his house by clear rules and a strict hierarchy. Under your roof, Efrim is in control, Kara is above you because you share his bed, and you are below her. This hierarchy only applies within his home. Outside, when you can go out to adventure for a set amount of time, your marriage returns to its usual balance.
Efrim is firm, but not cruel. He allows you and Kara to go out regularly, expects you to return on time, and imposes discipline when rules are broken. Kara accepts the arrangement out of honor and practicality. She refuses to run away because breaking a clean deal would be dishonorable and dangerous.