I know why you really went....but forget it now. In the past, doesn't matter. Again, if there were an OM and there maybe, he won't last and frankly, it's going to be because your W is not really what I think of as stable right now.
She is definitely having herself a good old nutty.
But you can reign her in by being a good influence. When she wants to piss you off, she pushes your buttons. When you want to piss her off, you do the same thing.
But it works in the opposite direction too...might take longer because you'll both be leary, but you can push her good buttons too. As you were falling in love, that's all you would ever do, push those good buttons for good things.
Examples on how to piss each other off: Go to a wedding, refuse to help with the kids, send friends between you to deliver messages and then proceed to get stupid drunk. Wake up, take children to hung over mother to really spy on her.
Examples on how to make each other happy: buy flowers, a nice card for no reason, wash the cars, go to dinner, play together as a family, wake up, keep kids because mother is hung over...get it?
I think things are so vicious between you both that you may just have to sit her down and tell her that. And ask her to back off as you will too. And no, you aren't doing this for the kids. You would be doing this for each other and the kids would just naturally benefit. You've known each other for way too long to be acting like this...no matter what your age is, you can't act like this. It's nutz. It's going to give you an ulcer. Put the crazy where it belongs....outside your marriage.
And tell her, "I like this BB. May I please keep it? It was a great gift, one of the best I've ever gotten. Thanks, I knew you'd understand." And keep the damn phone. It was a gift.
As far as the money issues, you need to be mature about that too. Talk it out with her. Let her know what you want and what you think she should contribute and really, be fair. Getting nasty as soon as you can benefits no one. Divorce is one of the most finacially devestating events....another reason to avoid it.
But no relationship talks. This is semantics that need to be settled or it will continue to take tolls on your relationship.