Can I get custody of my children because my wife tried to commit suicide?

I came home early from work to find my wife half naked wife a man trying to hide in the closet. I suggested going to therapy for the both of us. She then stated I will talk about my emotions but will not give any details. I stated I don't know what will be asked bit we need to be totally honest and open. She still declined to speak about everything and I was like it no need to go then let's just go our separate ways and file a divorce. That's when I went to bed because she was in the couch. Just to hear her go in the kitchen grab a knife and start cutting in herself on the patio. I try to talk her back in and think about the kids. She just kept cutting herself then stripped down to her underwear. This was also a 30 degree night. So I called 911.