How would you feel if your partner disrespect your mom?

My brother soon to be ex wife disrespected his mom on Facebook. She post all the time how she hate being married, how guys ain’t shit, and how she should have had her shit together so she can move and much more mess. As soon as he mentioned divorce, she stopped posting unhappy stuff. She even stopped wearing her wedding ring. She doesn’t even care to talk to him and don’t even care if something happens to him. She basically just need a place to stay. His mom feels disrespected by her because of the way she treats him and her

How would you feel if your partner disrespect your mom?
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