CW: alcohol/drug use

My younger sister hasn’t been able to visit me in about a year, and finally she is here this week. I was super excited to spend time with her. It’s a long story, but we were both abused growing up. I was able to cut off my parents, but due to finances, she wasn’t (I’ve offered her a place to live many times, she just doesn’t want it). As a result, she’s picked up a lot of my parents habits like binge drinking and abusing drugs/cigarettes. 

It’s been triggering because she does the same thing my parents would do which is putting on a show she wants, going outside and smoking/doing shots, and coming back in when the show is near the end and getting upset with me for not watching it. Furthermore, she’s always talking to me about my parents/showing me pictures of them and it’s just hard to hear and see that. 

Talking to her isn’t an option because it would require 1) a huge fight when she’s only here for a short time and 2) me asking her to give up her coping methods, which isn’t fair. 

I just really need some advice on how to deal with my triggers internally. I’m in a house I bought myself and now it feels like I’m back in my childhood home again with my abusive parents.