Family Issues Support Group
Family issues is a huge range that go from minor conflict to major misbehaviour and even abuse on the part of individual members of the family occur. Whether you feel you are in a dysfunctional family or you're dealing with a very specific issue, this is the place to talk about it and find others who might be going through the same thing.
Good luck....
Unless this money shortage is due to some unexpected event they really need to figure out a long term plan. SSDI should be paying her enough to live modestly. THat combined with two sisters who could work should be more than enough money. So they really need to look at the whole picture.
In the mean time they should talk to the landlord. If they have been good tenants and they are honest the landlord will appreciate knowing what is going on and should work with them.