SUBREDDIT: r/self
TITLE: Need suggestions on ways to help my best friend's little sister
POST: I have been racking my brain to think of ways to help this girl and I need some creative suggestions/advice.

Here is the story. My best friend (let's call her "Cindy") is an adult, living on her own, working full time and going to college about 2 hrs from where her mother and 15 yr old sister live (let's call her sister "Jenny"). Their mother has had a drinking problem for as long as I can remember and has already spent a few months in jail because of it. She has money problems, etc. and is a pretty selfish person to say the least. Cindy has always dropped everything to come home and try to fix what her mother has screwed up: electric shut off, car totaled, no groceries, etc.with her main concern being her sister Jenny's wellbeing. However, she is trying to finish her degree and working FT as well. Jenny is an incredibly smart girl. She doesn't drink/smoke because she doesn't want to end up like her mom and she is working as hard as she can to get herself an ivy league education after high school, but she has another 3 years to go. Basically, her main goal is to get into an awesome school far, far away from her mother and become something. I have no doubts she will accomplish exactly that if given the chance. The problem now is that their mother got yet another DUI and is facing more serious jail time. Meaning Jenny will most likely be placed with family members or a foster family- I don't know how that works. I would like to help her in some way to ensure she stays on track with her education and also emotional support of course, but I'm not sure how to do that. I know Cindy is going to do as much as she can but since I live closer I want to help. Any suggestions or advice would be most appreciated.
TL;DR: 
This 15 yr old girl's mom is going to jail and I need ideas in ways to offer my support and help keep her on track.