Apparently, if you "bend the rules" once you could lose the right to enforce them in the future. So even if Mom wanted to play nice (although it doesn't seem that is the case, but let's pretend for the sake of my explanation), if she gives him the extra day this time then she might lose the right to enforce deadlines for other things.
But the OP has stated that the rules have been bent FOR the mom before.
... and helps her out whenever she needs it...
...if she wants to go out of town for the weekend and it is her weekend, he takes the kids...
...We postponed our honeymoon to have his kids because she "suddenly" had to work....
....I feel that he helps her out whenever she needs it, but when we need something....she is black/white....no gray......
Seems she might be weakening the contract, if custody agreements can be compared to business contracts, in the first place.
I'd probably want to go back to court to get these requirements eased a bit. Would help the mom (since she keeps changing things) and would help the dad, too.
....I deal with an ex who is never here, never home and can never help out (military)....she just really doesnt know how well she has it sometimes, as far as ex's and help go...
It's too bad you guys can't get to know each other, talk a bit. Sigh.
My mom and stepmom would have been good friends, if it weren't for my dad stopping that from happening. They were very much alike! (eta: that was an "aside"...I"m not saying you guys are alike, just talking about my own mom and stepmom...all I wish for you is that you guys could talk, so she could see how good she has it)
So does this missed deadline mean you don't get the kids *at all* over the summer? If so, that's just sad. What a weirdly rigid deadline to have in a custody agreement, IMO.
I think that when there are TWO divorced people in a relationship, the agreements have to be redrawn for some give and take. Either that or the kids have to be talked to somewhat openly, explaining that sometimes the kids might not get exactly the same trips as the other, and that the child of the two married people might have different experiences as well. It's *complicated* when there are kids on all sides. Sooner the kids understand this, the better. (says the child of two divorces, with ex-step-sisters from my mom's second husband and 3 half-siblings from my dad's second wife, and grown step-siblings from mom's third husband who watched my brother be raised for 3 years in their dad's house with COMPLETELY different rules than they had.....with all sorts of trips on all sides, with no room for jealousy, because we all knew it was ridiculously complicated!)