Life is a game of chess. It's your move. You gave him an ultimatum...he made his move...which really was to become more defensive.
If the guy actually works, I would seriously consider packing enough of your and your son's things to move out. Stay with a relative, stay with a friend, or check into a hotel for a week. Go dark. Show that what you said you wanted you meant...
It ain't gonna be easy...but it's better than becoming a statistic.
"The journey of a thousand miles begins with one step." – Lao Tzu
