My Wife Left Me Today -sucks

The best defense is a good offense.
Pour yourself into the car and the kids.
Make the kids your focus for human contact, and work on the car of your stress relief. When the car get to paint, and you can enjoy it even more, it will bring some piece. I would make absolutely sure that it is one display any time she might be there, to show her that you are moving on, taking care of things, and moving forward.
Talking isn't cheating, but lying to have contact is deception, and untrustworthy. Without trust, the damage is done.