It sounds like your sister is making the choice to stay in a toxic environment. Although her boyfriend bringing home liquor is not "causing" her to drink, she knows it isn't making her attempts at abstinence any easier, and she has the choice to stay or go. And that's HER choice, she's a big girl.
Detachment reminder for me: I want to give everyone around me the dignity and respect to live their life the way they choose to live it, the same way I deserve the dignity and respect to live mine the way I want. Most of the time I can't even figure out what's best for me, let alone somebody else. My job is to simply get out of the way, and let God's plan reveal itself over time.
I know how hard it is to let go of others, I have an AStepdad, an A uncle, and an AexBF who I really thought was the one. I still love them all, but I have to let them live their lives.
