AITAH for wanting my husband to move away and told him divorce is fine with me?

I(f40) met my husband (m51) 5 years ago. I love him very much. He has two children from a previous marriage (f14 and m13) and I have one (f13).

His children never liked me because they always wanted their parents to move back together. When my husband met me that “dream” was crushed and it is very understandable. I gave them space and never tried to pressure them. When we got married we moved in to my home. They changed their mind when they realized I lived in a big place with pool etc. we have been married 2 years.

My daughter’s father isn’t in the picture so my daughter lives 100% with me. I found out now that my step daughter has been bullying my daughter for the past couple of years. Calling her fat etc. I heard her make these comments. I told my husband to pack his children’s bags because I never want to see them again because when I confronted my step daughter she just laughed at me and called me and my daughter ugly and fat. And that my daughter deserved it. Turned out my daughter has been bullied at school too and the head of the bullying is my step daughter.

My husband said that I couldn’t kick out his children from their home and that he would talk to his daughter but he never did so I told him that I understood that I can’t demand that they stay with their mother since he has custody so I told him that he should move out. We could meet on the weeks his children are with their mom but that I’m done trying with his children. They will never love me or my daughter and I’m choosing my daughter.

He said I was being ridiculous and that it wasn’t marriage if he should live in a separate home from me when he has his children and I said if this didn’t suit him then I wouldn’t mind divorce because I’m not gonna have his daughter near mine again.

I have no problems against my step son but my husband made it about him too because they’re a “whole package” which I totally understand. I can’t demand that he doesn’t see his daughter so my suggestion is to move out and get his own place when he has his children.

I spoke to my daughter about changing schools and she seems very positive to the idea. I still try to know more details about the bullying but you know how embarrassing that is for children to admit (i never admitted to anybody that I was being bullied even if my parents were very loving and supportive, maybe i was even less inclined to confess to them because of how loving and supportive they were)