People in crisis do not behave rationally. Do not true to apply logic to your wife's actions. If she ever comes out of hee crisis as a better person, it will be her challenge to fix the mess tat SHE made. No skin off your back.
Be there for the kids. They need to see they still have one sane parent for now. You will model to them how to deal with marital issues with grace and class.
Me, H-34 now 38 W-32 now 35 T-13 now 18 years M-6 now 9 Daughter 3 years now 7 Bomb 11/27/12 - OM 1 year in house separation Reconciliation 12/2013. Healed now 2017