AITA for not supporting my sister's relationship?
My (24M) sister (30 F) recently got out of a serious relationship with her ex. Their relationship was quite toxic. He would lie a lot, and she would fight with him and cuss him out a lot (like a lot) and when they moved in together, she told us that he became very different and abused her a lot. This led to her being really depressed and seeking therapy but that didn’t really work out for her. So she got in touch with her previous ex, who is married with kids. She claimed their relation was totally platonic and no one could pull her out from those dark times except for him. They would talk on facetime all day (to the point where we wouldn’t get to talk to her much) which led to our family being a little skeptical about the nature of their relationship. She would also go and meet him alone, and for context, in our culture, girls and boys don’t intermingle alone as much as in the West. Eventually, she said what we were expecting, that she had feelings for him and he is her soulmate. She said that his wife was abusive to him and his kids and was causing him to be depressed as well, which worries her a lot. She asked our parents whether she could marry him once he gets a divorce, but our parents refused since the nature of their relationship was extramarital and the idea of divorce in his head would probably have been propelled by her. Upon their refusal, my sister went crazy on all of us and threatened to cut us off. This led us to wonder if we were being unfair to her. AITA?