Quoting O ♥ G:" I'm not trying to cross any boundaries, but your mother is enabling your sister's behavior by always ... [snip!] ... for herself! I know it's hard cause that's her daughter, but maybe you should talk to your mom about distancing herself."
The thing is...My mom is like that with all of us. She helps us when we're in need. She's not going to up and cook us food every day, bring us a gallon of milk when we're out, or baby us in that sense. She gets in our asses when we get ourselves in smurffy situations, but she still tries to do what she can to help us back up. Like mothers do.
But my mom feels guilty because she distanced herself from my sister that passed away for similar reasons. She doesn't wanna make the same mistake again, ya know? But my dad has told her that she needs to "lower the boom" (as he says..) She knows she does and she will wind up doing so. It NEEDS to be done.