Once again very sorry this is happening--it's very important to tell the kids there's nothing they can do about this and continue to reinforce that, you really don't want them trying, they are under enough stress.
A couple other suggestions based on what I learned from our child and family therapist:
-- if you're going to discuss doing things as a family do it in private and announce to the boys what you're going to do versus trying to negotiate it in their presence. W should not have proposed the water park or movie in front of them.
-- If there are one or two family traditions you can maintain you should, at least for a while. In my case we would go out to dinner as a family once a week to a particular restaurant. We continued to do that through the divorce and for about six months afterwards until things stabilized and then we made it less frequent and tailed it off. It's better if you can pick one recurring tradition versus negotiating ad hoc activities because the boys can depend on the schedule.
Did you present this as what she wanted, or as a mutual choice? Stay strong for your boys, they will adapt
Acc
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015