Mary Jo was awful to J.D.
When J.D. lost his job, Mary Jo was awfully rude to him because she was JEALOUS.
When he stayed home, he cleaned the house, cooked and took care of the kids, he wasnt lazy and watching tv all day .
She was so jealous, she wasnt the one doing that while he worked. but i guess it would be okay for her , a woman to stay home.
She is going to kick him out the house because she is jealous he can stay home and she has to work. it isnt like he is just a friend, he is her boyfriend.