-- The key word here is BOTH. Do husband and wife always agree on everything? Um ... not in the universe I inhabit. When there is disagreement do they have to pick one choice over the other? Yes, unless you want stalemate. So sometimes the decision goes with one person's preference and the other has to accept it. I mean, is this news to anyone here?
-- In my numerous posts on the "Gerry" theory, I've pointed out that much rests on Gerry being the dominant one of the couple. Grumpy, domineering, prone to angry outbursts perhaps, and essentially selfish, i.e., one who does NOT lean toward "putting the children first" as so many of the fabulous husbands in cyberspace do.
-- So, all you have to do is buy the assumption that this is who Gerry is. You don't have to buy the assumption that most men are like this. Maybe only a tiny fraction are. Is Gerry one of that fraction?
-- If you can buy the assumption that Gerry is one of that fraction (and you don't have to, of course) then it shouldn't take a great leap of imagination to say that HE drove the decision to leave the kids alone. That and peer pressure since other parents in the group did too.
-- Yes, Kate might be a monster. All I'm saying is that she doesn't HAVE to be a monster. There are other possibilities.