You know.....I see that kind of thing a LOT with the spouse that left. It's a selfish thing and I think since they are in this selfish mode any thought of true responsibility is too much for them and they try to fill it up with "stuff". My former egf does this as well. She has her kids every OTHER WEEK and she is off during the day, but she waits until they are both all home from school and THEN takes them to the gym and works out while she puts them in the gym's daycare. I just really don't get it. When she is not working out, she takes them to Walmart, or comes up with SOMETHING to go do so that she is not home with them. I don't know.
