Exactly, the ex moving in would have been way overboard for me. I can see maybe if there was an emergency, but then we are talking a few days max, maybe. I still would never do that, i would put them up in a hotel, it would be a lot better for all envoled. The overnight trips with friends to party is also a big no no for me. Even with out the ex, unless its like a batchlorette party, i would expect to be invited. I would not go if i could not bring my SO. i should point out that these trips happen every few weeks. Another big red flag he mentioned was she was worried about getting an IUD, only my friend has been snipped. I mean wtf, can she suck a bowling ball thru a gardne hose?