This comes 4 years later, but I am dealing with almost the same situation, just not as lengthy of a trip. My inlaws asked my husband if they could take the kids to the beach, while my FIL was on a business trip to Myrtle Beach. They will only be gone 4 days. But, my husband, without asking me or telling them we'd get back to them, agreed that this was a great idea. My kids are 2 and 3 years old and are in a paid preschool 2 days a week, as well as were already signed up for VBS at our church the same week. So, not only will be losing money for preschool that is prepaid, but the kids will miss their VBS, to which the flyer has been on the fridge for 3 months!
My husband is angry at me, saying it's only 4 days, but it's 10 hours away. I wouldn't take my kids somewhere 10 hours away for basically 2 days! It's wrong and ridiculous that he has made these plans, without regard to my feelings or to our schedule. The other clencher is that he just changed jobs and will probably be on his "off" rotation those days that they are "gone," but I will be at work. So, it is like a personal little vacation for him, while I work. So, everyone BUT me wins, and I think honestly that this was his plan from the get-go, which it is terrible to say!
He told me I am crazy and ridiculous. He said very mean things, and accused me of being a control freak. His parents will only make plans "through" him all of a sudden. I think that this behavior is childish and unhealthy. I told him last night that they couldn't go, and he said that I was just mad because they didn't invite me! And apparently the plot thickens, as my SIL and BIL are going. So, they invited my kids, but not the rest of our family?? This is wrong, and I am about this close to telling them to pick HIM up and take him, and not return him!