Good luck with everything. I just read through some of the posts, and if anything does ever happen to her (ie suicide), no one but she can be to blame (and if she's as ill as it sounds, she's not altogether to blame, either). And, it really doesn't sound like she "knows" much of anything based in reality. I am not close with anyone who has a severe mental illness, but if someone is truly "crazy", many times they really have no clue that there's anything wrong or that they're controlling or manipulating. That has to be a maddening existence for her.

I'd pray for her and love her because she's a human being, but that's all I'd do. No eggshells, no accepting gifts, no nothing. Just a lot of prayer and a lot of love (and not even in an affectionate, showy way...just in a sort of energy/karmic/everyone's connected kind of way, if that makes any sense). Such a sad situation. Seriously, good luck! And, my only advice is to keep taking care of your own family, and do your best to not let her sickness poison you further.