So I've been married for a year now and my wife and I welcomed a daughter two months ago. My in-laws had been supportive until this past week, and now everything has been flipped upside by their frankly shocking behavior. My sister-in-law had a child three years ago, had a mental breakdown, and ended up in a mental institution where they gave her electroshock therapy, then while there she cheated on her husband with a patient, then later lied to the police and said he raped her, and then this resulted in the man killing himself. My sister-in-law also accused my father-in-law of sexually assaulting her years ago but claims she has forgiven him because "he's changed".
Last week my sister-in-law and my wife got in a fight over text because my sister-in-law has only visited us once since we had our baby but my wife visited her at least once a week after she had her baby. This fight resulted in my sister-in-law unleashing every possible insult towards my wife as possible. Then my sister-in-law told my mother-in-law about the fight and my mother-in-law came up to me one-on-one and asked me about the fight in a way that showed she was clearly believing my wife was in the wrong.
This is because my mother-in-law has huge bias towards my sister-in-law. She thinks my sister-in-law can do no wrong while she holds a huge grudge against my wife because she can't forgive my wife for stealing a couple hundred bucks from her 10 years ago.
So I told my wife that her mom knew about the fight and because of this her mom cussed me out on the phone and disowned me and blocked my phone number. Then my sister-in-law called my wife and said that her parents think my marriage is a joke and are waiting for and rooting for us to get a divorce. So I sent my father in law a text asking him if he really said this and he refused to answer so I told him the silence must mean it was true and I looked forward to proving him wrong.
This caused my in-laws to drive to my house and my father in law rushed up to me in my front yard with his eyes bloodshot and he pushed me. I told him not to do that because it is assault and he said I was "one of those types of people" and him and his wife started cussing me out until I told them that minutes earlier my sister-in-law brought up the fact that my father-in-law had sexually assaulted her. This caused them to rush off, claiming they were going to go confront her. But my wife has their location from Find My Phone so we watched as they did not go there and just went home. Then the next day my sister-in-law went to their house and spent the day there and her husband told us she came home in a good mood, so clearly a confrontation never happened. My sister in law's husband also apologized for his wife's behavior and told us the therapy he was paying for her was clearly not working.
Two days go by and we had to go to my in-laws house today to get some things and my mother-in-law tried to instigate a fight between my wife and I and then told us she never wants to see us ever again.
All this because A: I told my wife the truth about her mom knowing about a fight. B: I asked my father-in-law if he was insulting my marriage and C: Because my wife stole some money 10 years ago. But nothing my sister-in-law has done seems to affect how my in-laws feel about her. I'm just overall very confused by this situation. What do ya'll think?