On holiday with in-laws and we are all taking it in turns to cook dinner. On me and DH's night I cooked and he was watching the kids but then FIL asked him to help with something around the house that really couldn't wait. Everyone else was out or busy so I asked SIL to watch 10mo DS. She did for a while but then when I looked round he was crawling around the kitchen by himself and she was on the sofa playing video games. She totally ignored me as I cooked, laid the table and minded DS and DD.
I think she was very rude but DH thinks that she's just one of those people who thinks "your kids, your problem" and, as she and BIL had cooked a couple of nights before she felt like she'd done her bit.
I'm biased against her as she and BIL (she's his gf) stayed with us for 10 days and she was the laziest most ungrateful house guest I've ever had. My cooking was not up to scratch, she never helped clean up after dinner and she just generally made everything more difficult despite insisting she was staying with us to "help out".