A guy did this same thing in Florida, an ex girlfriend of mine went to school with the wife and husband.
Turns out some of the kids wasn't his.
They moved to Florida trying to work things out and she cheated on him with her co worker
He grabbed his deer hunting rifle and killed her then himself right in the living room
My girl was cheating on her husband at the time, it was a whole click
People always wonder how this can happen, I'm not condoning this in any way, just saying. When u wake up one day and realize your whole world is a lie and your family including your wife really ain't yours.....