This. Your mother doesn't want "guests" in her house. They only create more work for her and she is already overloaded. If your brother actually helped instead of "visiting" I wonder if her reaction would be different. I know this isn't exactly the same but after I had my older DD, my mother cooked, cleaned, took care of everything so I could focus on the baby. My GMIL came for an hour to coo over the baby and comment how dirty my house was getting. I feel for your mother.