You admit that you are not able to keep them for the entire week, correct? And that your
parenting plan as it is currently written would have then had you seeing your boys 2 nights out of this week, correct?
You also stated if I believe that you don't have any problem with them staying with the gparents while you are at work.
Your issue seems to be that you want to be able to pick them up every day after work for a few hours and then return them for their bedtime and night with the g-parents.
Did you know your ex was going to be gone all week? Did you request to keep the boys? Did you request for them to be available to you every day after work for a few hours?
If you did not do that, then IMHO I think you are off base with your expectation of what should be happening this week.
It is presumptuous of you to expect the g-parents to be at your beck and call when it is not something that has been coordinated ahead of time. They are staying at your ex's house under the presumption that the boys will be with them - and probably that you would be getting them on Monday and Wednesday, following the
court order. You coming in to demand "your time" with them isn't helping.
I think you should let them be where they are. The g-parents have been generous in allowing you time with the boys. They are not a party in your parenting plan and are under the direction of what your ex has left for them. Unless you made other arrangements, you also need to operate by the direction of the court order. Their arguing the
right of first refusal is a result of your insistence that they abide by it; and unless they have notice stating such and such is supposed to happen, I wouldn't abide by it either. Again, JMHO.
Also, the advice you receive out here really cannot be taken as an absolute - unless a poster who responds has been retained and posseses legal training for your particular state, county, etc, their suggestions are simply that - suggestions, opinions, and sharing of what worked/didn't work for their own situations. Be careful with how you take and use the advice - double check with your own lawyer and laws before you act.
Good luck!
==============================================================================
dsm - 37;
DH - 41;
SD - 18; LO - 12; BB - 5
------------------
It's time for me to do for me and mine. The others can worry about themselves for awhile.