Zinnagirl has given you excellent advice.
I think your sister is very lucky to have someone like you that cares about
her enough to seek help for her.
I wish I would have had someone in my family spot my depression and call me on it. I think it would have saved alot of heartache for me.
I do not know what kind of relationship that your sister has with her husband,or what you have with him.But,if it is good I would also suggest talking to him about
your worries over your sister.
I would tell her that you love her,and that you want her to be able to wake up in the morings and feel good about
Chronic Depression, Panic Attacks,Anxiety Attacks,Anorexia