This is likely to be an issue that carries forward for you into the future. I am sure you will get lots of different opinions on this. Perhaps I'm in a different situation because my H doesn't want to see the kids much or want custody at all. We have no agreement on particular times and probably never will.
That said, rather than my own hurt and my own pain, I try to think about the kids. Is what she is proposing hurting the kids? Have they voiced concerns about deviations from the plan? I think it is one thing to put the kids in the middle by making them decide and another to try to be flexible and just see how they adapt. At some point you may have greater needs for your own flexibility. Wouldn't the kids benefit the most by seeing two parents who put their own stuff aside and work as partners in raising them? Kudos to both of you for wanting to be there and to have your time with the kids!
They do have an agreement in place. The D decree merely cements it.
The way I read his original question is not about the kids welfare now, so much as wondering about changing the divorce agreement at the 11th hour,
to say that no changes can ever be made. Good luck getting through this week!
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