I honestly am very confused right now. At the time I did the title I was sure I was doing something that would help her, now I'm pretty sure I'm the asshole.

So my sister's boyfriend (my best friend of 10 years) has been leading my sister on. They started dating almost immediately after he separated from his wife and for two months everything was good. I wasn't thrilled about this, but they are both dear to me and they seemed happy.

Then he suddenly starts to have second thoughts about divorcing his wife. He breaks up with my sister and starts doing a friends with benefits thing with her as he is also seeing his wife and thinking about getting back together with her. I am even less thrilled about this. They both start to pull away from me and for a while I barely hear from them. We used to be really close, like talk every day and while I still message them they barely respond and I can tell things are going on.

Thanksgiving happens and my sister comes over. I'd made dinner this year and was looking forward to seeing my sister. She comes over and is a ghost of herself. She barely talks, and just looks miserable. She takes off during the evening, just says she is going out for a bit. After about an hour she returns and looks like she is on the verge of tears. She asks me to come and spend some time with her at her apartment. So I agree and later that night she tells me that my best friend chose his wife over her and is refusing to see her. So I comfort her, and we talk and I tell her she is better off.

We spend the next day just doing fun stuff and the day after that I decide that it is time I talk with my best friend. Basically what that came down to was that I told him that I was disappointed with him for treating my sister like a friend with benefits while he was also seeing his wife that he was separated from. Then I ask him not to talk to her for a bit as she just needs to get over him before they can try to be friends or figure out what they are going forward.

This is what I'm not sure if I'm the asshole about. My sister had been texting him nonstop and I thought that she is never going to move past this of she keeps poking at her wound. But he told her maybe an hour later what I said and she is currently kicking me out of her apartment she is so angry. And I get where she is coming from I really do. I'm just not sure if I did the right thing or am I the asshole. I currently am managing to feel both at once.

With all that said please be kind in what you post below. I'm currently hurting because I obviously hurt my sister and I am sorry for that, but I cant shake the feeling that not talking to her ex-bf for a bit wont help her in the long term.