Are you not supposed to take them out to dinner, to a movie, to school?
Did she say that? That they couldn't go to SCHOOL or a movie or out to dinner??
I would feel comfortable having my own sister (no kids of her own) coming to stay at my house for my kids. I would
not feel comfortable having her take them anywhere not local, and therefore, I wouldn't have her come, because I'd find it difficult to tell her to stay home or in the area.
My kids are older now (18, 16, 14), so it wouldn't come up anyway. But, when they were younger, she came for a visit (she lived in CA, I'm in RI) and took them to the RI beaches. We were getting the tail end of a hurricane...high seas. She took them out on a cliff, and a big wave came over them, and luckily they only got wet, not swept away. They still mention that whenever we're in that area, and I cringe, because my DH was furious at the time it happened, and I hate to remind him MY sister brought them there. Several years later, DD's friend's father was swept away and drowned in similar circumstances.
And it's not just this situation. Other times, it was obvious that she just wasn't on the same page that I was. Like expecting DS, then about 3, to behave flawlessly while she clothes shopped for hours. Or arguing with my DD when she was a toddler that if she wasn't going to FINISH the apple, she shouldn't have taken it (of course, I wouldn't have GIVEN her a whole apple). Or taking them to Boston when they were younger, and hearing from the kids how they waited in the store while she tried on clothes in the dressing room.
There are people I'd let take my kids places, before I'd let her (or my ILs, for similar reasons...they just did things differently...altho I'd let them stay at their house), but I do understand wanting them to be in one spot while I'm away. As a matter of fact, in April, while my oldest is in college, my 16 yr old will be in Spain, and my 14 yr old in England, and DH and I are going to WDW. But I even have an uneasiness about US being away from home, in case "something happens".
And an FYI...I wouldn't let HER take my kids to England or Spain...I'm much more comfortable with the groups they're going with. I wouldn't let just anyone whose house I'd let my kids stay at necessarily take them away somewhere. Maybe your sister doesn't trust you as much as you think. I also have an issue with my sister's driving (as does my whole family!) and still wouldn't feel comfortable with them in her car. I DO feel comfortable with my 18 yr old driving, and even my 16 yr old, who has her permit now. Both good drivers.
Well, honestly, I wouldn't expect you to stay home all weekend, but I wouldn't want my kids away from home either, as in staying somewhere other than your house or your sisters, whichever you'll be at. I have not left my kids yet (they're young still) but if my parents watched them, I would not be comfortable w/them taking the kids 3 hrs away while I'm gone. Actually anytime. Thats just me. I don't think your sister is crazy not expecting you to not go 2.5 hrs away to a resort. If she expects you to not leave the house - thats crazy.
Also, my kids don't have to be "taken somewhere" to have fun. My DH goes away on "male bonding" trips twice a year, and we'd always make a big deal about splurging on treats, or movies, or doing something special locally.
I'm always fascinated by how easily people are labelled "crazy" on the DIS.
