I wasn't sure what to say... or rather whether to say anything at first. I don't know you and your situation well enough to warrant any sort of "Buck up friend.. it will get better..." type of comment. But then I got to this point in your thread.
Again - I have no concept of your wife's condition (other than maybe it's like a bad trip). My cousin several years ago was diagnosed Paranoid Schizophrenic, and was summarily locked away in a "home" for the past several years, contributing to greater manic depression. For whatever reason, it likely contributed to his demise last month unfortunately. I had not seen him in the last maybe 10 years, and unfortunately, I did miss his funeral. But that is beside the point.
The bolded portion of your post - that's what I find disturbing. What people don't understand is that your wife probably needs you and Emily the most right now. I understand that your wife may have the capacity to harm someone, but your daughter probably would be the key to treatment. Mental disorders can be treated to some extent with chemicals - but those are mind-altering, just as LSD, PCP, etc. You end up losing yourself and becoming something artificial. It may take a long time to find the real person behind the pain, but have faith in the human brain.
In any event, I do wish you the best of luck at getting your life and family back. It will take its toll on you, but don't let it take you with it.