Personally, with how your W is acting right now, I think it benefits all of you, especially the kids, if she is out of the house. I mean if she doesn't even want to come into their rooms to say goodnight or get up in the morning with them, she's doing more damage being there right now.
You said that you think the kids know something is a miss - based on what you describe is going on I am certain they know what's going on, much more than you think.
The situation isn't healthy for you or them. Keep being there for your kids man, they really, really need you right now.
