My DD who is 2 1/2 is a little to 'bright' for her own good. Recently she has taken to hitting me when she doesn't get her way. The first time I told her it was not nice to hit mummy etc ... the behaviour continued so I took her and sat her on the naughty step (never had to use before this). When she was ready to say sorry she came back. However a day later (last sunday) she came up, looked me in the eye, said she wanted to sit on the naughty step and then proceeded to hit me and take herself off to the step .... Im at a loss!!! what should I try next?