Please help! DD is 5.25, with 1 yo sister. Since baby started becoming "more interesting" (doing things for herself, copying, crawling) 5yo started acting up more, acting like a baby etc - all of which expected and, whilst irritating, is understandable. We assume she'll grow out of it shortly?
Our main problem is that she's lying about everything. She started before her sister was born and I know it's a useful developmental thing, but how do we discourage it without her learning to lie so brilliantly we can't detect it?
We've tried sending her to her room/naughty step, I got her to write "I must not tell lies" 20 times (and felt like that witch out of Harry Potter!), we've tried explaining how the other person might feel, we've cancelled treats etc. If we let her get away with it/ignore it, I worry it'll get worse, if we punish all the time I'm afraid she'll never want to confess when she's done something wrong.
Any ideas please?