At home fiancé

My nefue is with this girl that is bipolar. When she gets mad she starts to throw stuff and yell. It's weird because she can be nice one minute a with a snap of a finger start yelling and freaking out. I understand it is a mental illness but it bad behavior. I honestly don't know how he puts up with it. He is now engaged to this girl. She does work but he does. When people ask her what she does for a job she says she is a at home fiancé. Seriously that is really bad I have heard of a at home mom but not a at home fiancé.I guess a at home fiancé means you stay at home and just collect money, do house work and shop. That exactly what she does. This to me is a user and abuser. To call herself at home fiancé is rediculous.