No need for apologies. I understand completely. I was just thinking of you having to bounce back and forth from thread to thread.
Well It is very confusing trying to figure things out. So hey, don't right now. Focus on yourself and your children. It's great to hear that they are bonding with you more and if they notice the changes in you, I can guarantee your wife does as well. She will never let you know that though.
It sounds like your head is in the right spot. Dbing will work in any case. Don't let trying to figure out or diagnose your wife turn into an obsession. The bottom line right now is taking care of yourself and your children. That is why your here. Saving your marriage has to come second right now.
Just take it a day at a time. Don't do anything to help your wife out the door. Let her do all the work. You may want to continue learning about depression and MLC and see if you find more things that fit when you get a chance.