Labug you have given me some great wisdom in your post. Thank you. I like your use of the word "kneecapping" in describing hurting the W along with the 2 babies. It struck home with my sitch also.
Pilot I am an attorney but likely not one in your state. And I agree with Labug on the marital contribution on the airplane issue. To me on its face it appears quite reasonable, and not at all "unreasonable" as you suggest, but of course it all depends on the facts. But don't dismiss her claim so quickly. Be humble about this and take off your boxing gloves.