I have been NC with SIL since 2014.
Reason was she was constantly interfering in our marriage and not respecting my boundaries. She constantly tries to get as much information about us from exDP and then shares with her friends. She also wanted to decorate for us our new flat without asking me. When I told her to mind her own business she changed tactics. The new strategy was to see the kids behind my back and act like I was irrelevant. DS1 had tonsillectomy, she visited him when I left exDP to stay the night. When DS2 was eight weeks old, she came outside the house and asked exDP to bring DS2 so she could meet him. I gave exDP a piece of my mind. I was so frustrated that exDP never told SIL to respect my boundaries and we separated for an year and half and later reconciled.
I then went NC with SIL since 2014. She however, took every opportunity to constantly say bad things about me to exDP whenever he went to visit MIL who lives at her house. Whenever exDP return home to me and the kids he was always in a mood and giving us silent treatment.
This year in January I had DS3 via c-section. Six weeks later I found out from DS1 that on the night I was in hospital SIL came to the house and ExDP kept it a secret from me. I was at a loss of words. DS1 told me she came when they returned from the hospital to see me and she stayed for about an hour watching a movie with them and before she left she had a good look around the house.
I confronted exDP and his response was "I'd rather keep things SIL does from you than add fuel to the fire knowing that you will be upset".
I was so livid and also felt helpless and a range of emotions. Despite going no contact with SIL for a number of years she had made it her mission to interfere in my life and especially showing me I was worthless because she would see the kids whether I liked it or not.
I decided to go to the police and report her for harassment. The police were very sympathetic but made it clear that it was a civil matter. They also made it clear that all these things wouldn't happen if exDP made sure there were clear boundaries.He suggested I send SIL a copy of the crime reference and tell her that I had been to the station and would start calling 101 if she continued harassing me. The police also referred me to a Domestic Violence support agency. I sent her a text with the crime reference number hoping that would knock some sense into her. I also had a conversation with my exDP. I also decided the kids can't go to her house (unfortunately this means also seeing grandma) because I can't trust her around my kids.
Thinking this was the end of things, I was very wrong. She began telling my husband why did I go to the police without my husband's permission. Hearing this he began saying I had made him half a man by not consulting him. Knowing that I had said the kids won't be going to her house, the angle of the conversation changed. It now became how dare I refuse the kids go and see grandma and that I was being a horrible person. Even though we weren't on good terms with SIL, I was allowing the kids to go see grandma every weekend for the last 2 years.
Going into lockdown, DS1 is classed as clinically vulnerable and we were keeping him home. He has sleep apnea.
Fast forward from March to December the arguments with exDP continued until the beginning of this month. I started a new job as a trainee teacher and didn't even last two weeks. Every day I walk in from walk it is non stop arguments and guilt tripping. I gave him an ultimatum and told him to either stay or leave. He took his coat and left and came back the next day and took his things and had moved into SIL place. I had to quit the job as I was stuck with childcare.
He took the car (even though it was in his name) I needed the car for the school run. DS1 has additional needs and his high school is 15 minutes away by car.
It's been nearly 4 weeks he hasn't even called the kids. They have been left wondering where he went.
He then said he wants to have the rights to not only visit the kids but also take them to his mum and his family (SIL) and he is ready to take me to court to fight me for that.
I spoke to a domestic violence agency who have told me what my options can be going forward. I also spoke to social services. Now that we are getting a divorce I know they (exDP and SIL) will now take things up a notch. It's such an emotionally daring experience and I feel like the whole intention was to rob me of peace of mind or keep me so anxious that I would not have time to devote to the kids and their needs.
Sorry for the long post. Please let me know your thoughts.