ex wife and my kids

Im am the father of a 6 and 7 year old whose mom just tried killing her own grandmother because she was a vampire. She is currently undergoing evaluations in jail, and my daughter is having a terrible time with it. She doesnt believe me when i tell her her mom is sick because she says that her mom told her i lie to her to keep them apart. Her mom also told her she needs to pay attention to her dreams because they predict the future, and wouldnt you know it, she has dreams of dying. I have her in therapy as we speak. My question is, is there anyone out there who has an ill ex in jail for committing a crime thats a result of their sickness, and what can i expect the courts to rule on her sentence, and will i have to allow the kids to see her? the thought of her getting out in a couple years because shes on a pill that she can stop taking at any time, and me being forced to allow her with the kids scares me. i look forward to any responses. thanks