My husband and I lived with my mother in law for a year or so after we were married - there were various medical/financial difficulties going on, and she was generous enough to share her lovely condo with us. While things were not perfect, I wouldn't hesitate to live with her again if the situation warranted it. She is a total sweetheart and I adore her.

My FIL and his wife, I would welcome into our home. My mom too. My dad...no. I put up with enough of his garbage and abuse growing up, I won't share a home with him again.