That's it really. It hasn't really sunk in yet. It happened while I was at work today so I didn't see it and don't know what his demeanour was like when he was doing it (playful or aggressive) but it was enough for our very calm and lovely nanny to give him a hell of a telling off. His dad then followed up with another mighty telling off when he got home and heard about it. I'm still at work. What would you do? They share a bedroom and now I am scared that she might not be safe? She is ten months old. Should I take her out? Is that over reacting? He turned four in late July and is normally a happy, lovely little boy though he is definitely pushing the boundaries recently with naughty behaviour (eg not stopping doing naughty things when he's told - in fact, continuing to do them to test our reaction - that sort of thing, but just little things) He started school recently and seems to have settled in really well but his behaviour has definitely gone downhill since he started. Apart from starting school there have been no other big changes in his life - he has had the same lovely nanny for a long time; and no big changes to routine. The only thing is that I am working very long hours at the moment so spending a little less time with him than usual. I would really appreciate any advice/shared experiences but pleased be gentle - i'm already ashamed. I love him so much. I have been very proud of how little jealousy he's shown towards her before this.