My husband’s ex wife is crazy.

I’m convinced my husbands ex wife is crazy. I could write a whole book about things she’s done but last night was a wtf. My oldest step daughter comes down stairs from her room crying. Her mother called my step daughters to harass them about why they didn’t take their bathroom trash out. She told them Wednesday while they were with us and then they forgot Thursday and on Friday when they were supposed to be coming to our house she kept them late to take them to a school play they didn’t want to go to so they had no time to do. She constantly assigns them chores and between her wanting to go out all the time and their chores they have no time to do homework. I swear every week she just gets crazier. We are waiting for both my step daughters to be over 12 which is in a few months to ask for full custody cause their mom is just too much for them to handle and they want to live with us.