You have no idea what you're in for. Perhaps it would help if you named the hellhole in particular, but as a whole, you can expect some truly bizarre, sexually perverse things. The people who run these facilities have a psychosexual fetish for torturing children.
If you don't come out of there hating her- assuming you survive- I will be very, very surprised.
I strongly recommend that you send your mother to the below websites before this gets started.