Hoping others may have some advice. My 17 yo DSD is constantly taking food without asking. Every time we buy a pack of biscuits it has vanished within a week (I've stopped buying them). Now she has eaten a whole box of cereal bars in the space of two days, and has also been helping herself to sweets. Even when we catch her red handed (either in the cupboard in the process of taking it, or because she leaves the wrappers lying around on her bed), she vehemently denies taking anything. To make matters worse she has type 1 diabetes, so constant snacking isn't great for her. She always says she needed it as her blood sugars went low, but when we check her data we can see that is a lie.
Thing is, DH and I don't mind if she wants a biscuit with her cup of tea of an evening if she asks. My DS and other DSD both always ask before they take anything. I don't think we'd car if it was just occasionally but this is literally 3-4 items being taken every day.
Anyone got any ideas? I'm at the point where I'm genuinely considering a lock on the kitchen door!