I think your advice totally missed the mark this time. We're dealing with a lazy, emotional abuser (the boyfriend), an enabler (the mother) and perhaps a depressed and embarrassed sister. No one wins here. The mother should sell the house, allow the sister to temporarily move back home if she needs to (while paying room and board - life's not a free ride) or move into a rental with roommates (that part was good advice) and grow up.  The situation can only get worse and talking will not help as I'm sure this has been done to death already. Pull the safety net out from under them. It's time they both grew up. What young millenial is entitled to live in a house anyway - as you said, what's wrong with sharing an apartment until you can "make it on your own"?