Recently my DD keeps lieing about things, just now she has came threw to tell me her younger DB put food in her cup. I went threw and there is food in boths cups. Both saying the other one done it. I told her not to lie and to tell me if she out food in his cup, which she admitted too. So she put food in his cup, he did the same then she came to tell me that he done it to him so he would get the row! There was an incident a week or so ago where she drew on the floor (very out of the ordinary) and totally lied about it, knowing her bother would get the blame. She has a Sleepover that she has been invited to in an hour. AIBU to not let her go? I don't want to be too hard in her but I also don't want to let her think she can keep getting away with it. I'd say 9 times our of 10 she is caught in her lies. She is 7 and her DB is 3.