The need for control is so astounding isn't it. I have been seeing quite desperate actions from mine of late. You are how far away from being divorced now and he is writing to you about Costco cards and bragging about paying for your AAA (that you don't even want)? I would say unreal, but I'm living the same thing at the moment.
They do the divorce filing, or threaten it, as a means for control and they don't realize it is the ultimate loss of control. You will soon have a court order to protect you and the boys from his craziness. I don't think that will be the end though, he will push every boundary he can.
I hope he tires of this or works through his fears about it. One of my kids has a birthday coming up, and then of course Father's Day. Ugh. Hope yours passes uneventfully.
