So my husband and I started going through a rough patch and I felt something wasn’t right!. So after trying to have a conversation with him I figured out it wasn’t a rough patch, he was interested in and was talking to a younger woman🤦♀️. So I reminded him that I wasn’t going through this again and I would like him to make a choice between his marriage or the girl!, he said it was unfair to make him choose🤨 so I told him that our relationship was over and the children and would move out as soon as I could get a house. We agreed we would tell the children together and that we would make sure it didn’t affect them. Well from that day he started staying out until gone midnight and hardly see the children, then when I tried to talk to him about the children meeting possible partners we agreed that we would talk to each other and that 6 months was best for the children and asked him about having set days to look after the children he said he couldn’t do that because what if there were an emergency like he broke his leg or the dog needed the vet🤨 so I said fine think about but we need to sort something. Well he offered to look after the children so I could go out ( not once in the 22 year relationship was I allowed to go out!!). When I got home he said he had taken the children to the park and they had met his girlfriend and her children after only being together for a month 🤬 at this point the elder of the 3 (who is 16 but is autistic) knew we were separated but didn’t know about there being a girlfriend as we hadn’t talked about it she just figured something was wrong because of how he was acting and the younger 2 who are 10 and 9 thought that mum and dad just slept in different rooms 🤦♀️. I felt so angry for the children not having the time to process the new information or have the time to give their opinion as he told them 30mins before that he had someone special he would really like them to meet!. Now I’m worried he is going to invite them into our family home and push it on the children just to make him feel good about his new relationship and to make me feel uncomfortable🙄🤦♀️. He constantly reminds me that it is not my home it is his and tells me he can’t wait for me to leave. I feel like hiring hotel rooms for me and the children so he can’t force the relationship onto them. I know that is irrational thinking but my children are all neurodivergent and suffer terribly with change🤦♀️. What should I do?.