Anonymous wrote:They mean "Please, don't trouble yourself, sweet MIL, this is your vacation and we don't want to be a burden." Unless it's a more subtle way of saying "It's none of your business, we're adults and of course we brought our own toiletries." Hard to say without knowing more about your interactions. All else being equal, I'd assume the best!
Yes it could be politeness but, also, OP, are you by any chance really controlling and offering to "help" as a way to control? I could see a DIL decide that she didn't want to confront you directly but she also wasn't going to let you call the shots. But as pp said, it's hard to know without more info.
But here is a word of advice. This is something between you and your DIL. This is not a millennial thing. I get frustrated when people have issues with their families and they want to attribute it to generational differences that affect everyone across the board. Nope this is you and your DIL. Anyway hope she's just being really polite. Try to back off a little bit and enjoy yourself and let her be whomever she wants to be.