I have four children so I do appreciate what you are going through.....and your M sounds not unlike how mine had gotten to....but your mindset is in the wrong place.
For goodness sakes......I am assuming it was you who CAUSED your W to be pregnant so you are in this together. You need to work on this.....and hiding in your workshop won't fix it.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength