Kat: Maybe she IS better off. Obviously her mother cannot let go and is killing her with kindness. Our job as parents is not to give our kids everything they want but to teach them to appreciate, learn to become independent and support them when they need help - but mostly to let them struggle on their own for a bit.
A psych evaluation is in order. I assume she is in hospital. It is not likely they will let her out without a complete psych workup and probably counselling for the whole family. That is probably the best that can come out of this.
It IS a mess. You can probably help your brother by being there for him - even if it is by phone or email.
