So my daughter is 11 and has a friend round for the night. Its a usual thing. She has a friend round most weekends for a night or 2 depending on the friend. I have just been up to check on them and as I went up she hid something. After asking 3 times what she was hiding she pulled out some empty packets. I thought maybe the friend had brought them so I asked where she got them and she said downstairs. She had taken packets of biscuits out of the snack box downstairs. We always say if they are hungry they can eat whenever they want but it must be healthy so fruit or a yoghurt. I asked her why she stole them and she just shrugged as she didn't know what to say. I told her if she had asked I would have said yes but she stole them which was naughty. She has always been so good, and I mean amazingly good.she does as she's told, no backchat etc. But she has started getting sneaky. She took some dvds off my shelf a few weeks ago and took them to her friends without asking. They weren't appropriate for their age. I don't know what to do as never had to deal with it. I told her off and said she wasn't having anyone over for the next 2 weekends and I've taken her phone. What can I do to get it drummed in that she can't just start taking things. I told her I need to trust her and if she carries on I won't be able to. Or am I just completely over reacting?!