What can be done about my nephew?

My 26-year-old sister Sarah suffers from lots of disorders (narcissism, being one of them) including borderline personality disorder. Her whole life, my parents have coddled her (due to her being born with albinism and nystagmus- they actually thought she would be blind after she was born) and this has created a monster of a personality that has made our family fairly miserable. My dad died in 2007, and my mom is not one to fend for herself, but she has been doing okay up until the past couple of years. Sarah has been completely unable and uninterested in working ever since she had her child with a 40-year-old man a few years ago. This little kid has been developing problems in school, and they’re giving him attention deficit disorder meds now. Sarah is living with a boyfriend who has no job and no prospects but lives with his father, who is a paraplegic veteran and gets government benefits. Sarah can’t drive but Ian (the boyfriend) can, but he no longer wants to get up at 6:30 in the morning and take the kid to school, so my mom is going to be forced to drive 30 miles to pick him up and take him to school, then go to work 15 miles away. At the end of this month, Ian’s dad is kicking Sarah out because she got angry one night and took a guitar and smashed it into a bookshelf. He is tired of her, as everyone who lets her in becomes. So on June 1st, Chase (my nephew) and Sarah will be homeless. And Sarah isn’t willing to get a job. My mom has helped Sarah before to get a townhouse, and she actually paid her rent. Sarah returned the favor by bringing in terrible roommates that trashed the house, and completely disrespected my mom.

I told my mom to call DSS ( who has dealt with Sarah in a case before) and let them know ahead of time that Sarah won’t be able to provide him with shelter or anything else after May 30th, and to ask them if she (my mom) can take Chase into her house and care for him. That will leave Sarah to her own, and from the behavior I have been told she has been exhibiting lately, I think she needs psychiatric or psychological help.

Phew…so I guess I am asking if anyone knows what to do legally speaking, or if they have any experience with this sort of thing.