my daughter is 13 months old and stays at home. Every few weeks, we have my in-laws take care of her for a few hours at a time while we run errands, see a movie, etc. My problem is that my daughter doesn't eat or sleep while she's there. I'm not sure if my mother in law just doesn't try hard enough or my daughter is just that strong willed. This has been happening since she was a newborn

Whenever my daughter is around my sister or my mom, she does everything on schedule - we haven't really left her with a babysitter or stranger.

My main issue is that this totally messes up her day - last night she didn't go to bed until 10pm, because she napped at 5:30 when I picked her up. I'd like to break her of the habit, but am unsure of how to do this. Any suggestions?