you can always or occasionally say that you do NOT wish to have your compensation day, "in order to keep the kids's schedule more routine"...
That^^ would model something for your stbxw, and set your own boundary I suppose.
But you must decide if more time with your kids is of more value to you,
than setting a boundary, especially a boundary that might seem arbitrary,
or related more to anger, ego or fear or whatever...
Do you disapprove of her flying wherever she's headed? If so, that is what you're really dealing with.
If not, then I'd just go back to the "choose your battles carefully".
In my opinion...
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016