My Amnesiac Husband Thinks He's My Side Piece

So my husband lost his memory. I told him his family went broke and he's my servant now. He totally bought it. Then my ex shows up and he thinks that's my husband. He's literally crying, begging me: "I'll be your side piece. Your toy. Just don't leave me." Plot twist—he is my husband. He's jealous of himself. When he remembers, he's gonna lose it.