My ex boyfriend and I are trying to work things out. His relationship with the mother of his child has been a problem with me because I feel they have no boundaries. For example, while we were in a relationship she would send him sexually charged comments. He would tell me she’s just joking but I don’t find it funny and he won’t correct it. Now today while I was at his house, her car broke down on her way to drop off their kids. She ended up having to stay the night. At 12 o’clock in the morning, he is alone in the guest room with her for almost an hour. It upset me and I told him that but he didn’t think it was a big deal. Am I overreacting?