Yes, let her and her kids go on their trip with her family.
Be prepared how you might respond if she decides to make a reversal and now you can come along with them again.
You do have a right to privacy and confidentiality, especially in this sort of situation, unwinding a marriage.
It ought to be relatively simple since you don't have children together. That means no custody or co-parenting complications. It's a relatively short term marriage so your support obligations should be minimal, hopefully only during the divorce process. But you know she will still make it complicated.
Be especially cautious about "sour grapes" allegations, either against you or your own kids. She may try to retaliate and - whether purposely or not - mess up your custody with your kids.
A clean break, as much as possible, is best. As much as possible let the lawyer be the buffer with notifications and negotiations. Of course do as much legwork as possible to reduce billings but in high conflict scenarios your lawyer is paid to protect you from legal repercussions.



!!! We will hold you to it.