I have no parent-in-laws in this present relationship although my husband does have siblings. Only one sister and her husband talk to us or give us the time of day - this since an incident several Summers ago. The short story is that at a family gathering they were teasing, mentally and verbally abusing the son of one of my husband's BILs. I had observed this young man to be autistic and to likely have a mental health issue. They were merciless and went in for the jugular when he pleaded with them to stop. It was one of the cruelest things I have ever seen. These people were getting sheer glee from battering and destroying this boy. It was awful and I couldn't just sit there and watch. So I stood up and told everyone to stop. These people were shocked I would do such a thing. Next they turned their bullying onto me. My husband spoke up in my defense and we then left. With the exception then of the one sister we have been persona non grata ever since. I feel badly my outburst has caused a rift between my husband and his family. Yet, I would take the same action again and again and again.