My 3 year old boy seems to be jealous of his 13 month old sister. This has been since she was about 4 months old. He pushes, hits, bites, etc, and also takes away any toy that she's playing with. We tell him that he must not hurt her and are currently using the naughty step as a punishment, but it doesn't seem to work on him as he will often hurt her again not long after coming off and saying sorry.
We praise him when he plays nicely and does good things with her, and we feel we give him lots of attention and praise.
If this rings any bells, he's also copying her behaviour more and more, so I'm assumimg it's all down to jealousy.
I can't leave them alone for a second, so I'm finding it difficult to get anything done when both of them are awake.
He is generally a well behaved boy with other children (he goes to nursery a couple of mornings a week), it's just with his sister that he's like this.
Does anyone have any advice? Any help would be very much appreciated.