I know I have posted this before to you. But can't help but do it again...Children have no place in the fighting that takes place in a marriage. What you put your children through is terrible and heart breaking. You should not hope that they will help build your marriage up. Get yourself a counselor for that!
Also all you did was act like the boy who cried wolf. Don't think for one minute that your wife can't see that. You try to act dominant and tell her your parents will help you get back at her and get the house you live in. Then the kid's state all they want is to live in their house. So then you are feeling smug and tell her you are going to file for divorce.(which I might add you have done before) Then hmmmmmmm what comes next you ask for sex!hahahahahahaha So predictable! You are trying to control her through being dominant. You can't stand to lose control for one second. You feel you have to have the upper hand all the time. I agree your wife was wrong in forgetting her obligations about picking up her daughter. But yiu handled things wrong. You started off good. But then went all dominant. Then acted like the boy who cried wolf. Believe me she can see through this.