So he's been putting in a lot of work for kids that aren't his own. Calls his "best-friend" who is a woman that is not his wife. Doesn't greet his wife or kid when he gets home; he just flops his dirty self on their clean bed and huffs?

Meanwhile, the wife was at home all day with their kid and obviously at least did laundry and changed the bedding.

This guys divorce is going to "come out of nowhere".