I know from experience what you are going through. When a brother and sister are close (like myself and my sister)there is competition for attention when someone new enters the scene. I believe that is what happened to you. She saw you as competition for his attention. That is why after you left she was fine.

@PTCdresser57 My SO is going to talk to her tonight. If that fails then I might try to talk to her and him. The thought of that though gives me anxiety like there's no tomorrow. Our relationship is still new, so I don't want to step on anyone's toes.

@PTCdresser57 I didn't think of that, that sounds much more plausible, especially considering that they've been living together for 4 years. I guess I just don't know what to do about it now that she's upset with me hanging around. Should I just give it time?

2 things you may want to try. Sitting down with both of them and talking about it. Communication is key in any relationship and you are wanting a relationship with her and shorter visits.

I get what you are saying. If he can get though to her then it may be fine. If you need to talk to the both of them at the same time open up that you are nervous about it...but that you so want to be friends and hang with her just like bio sisters would do.

You are very welcome I am glad to help. If you need anything else you can reach me at djgolfer52@gmail.com I will gladly help if I can.

@PTCdresser57 I'll do that if push comes to shove, thanks so much. I feel better than I did yesterday, that's for sure.

If. She is older she may have a motherly complex towards him if younger maybe something else either way she is jealous