Oh no... My 2 year old son is getting jealous at his 1 month old little sister. He has started to hit/slap/scratch his sister and I don't know what to do.. One minute, he would be kissing and cuddling then the next, he would plant a sudden slap/push/punch/scratch on her. If I grabbed his hand and told him "No", he would try to get more slap/push/punch/scratch on her before I get really angry.
I have in response
1. grabbed his hands and told him "No, be gentle, you are a good boy"
2. Grabbed his hands and slapped it.
3. Taken him and put him in the naughty corner
(I am not sure which is a better way to deal with the situation and how it might affect him).