There is definitely something magical about Advent -- hope, joy, it's real! Keep giving that to your kids! They will be able to always remember how their dad was a rock during a dark period when their mom went crazy. They will be grateful to you and they will learn how to be strong in crisis. They will learn forgiveness and love by watching you. You are doing great, so much better in what you described about your being home and doing your thing. Get each kid an extra special ornament or make one with them, they will love it.
I believe I will see the bounty of the Lord in the land of the living. Wait for the Lord with courage. Be stouthearted, and wait for the Lord.
