DS is 2.8, dd2 is 10 months old. There is also DD1 in the equasion who is 5.2.
DD1 and DS are very close and always have been. When DD2 was born, DS was 21 months and was ok with her - a little jealous but liked to hold her and have a cuddle. Lately the dimensions are changing and ds is getting increasingly nasty to dd2.
DD1 has now started school so I thought that ds and dd2 would get a bit closer as it is just the two of them at home but it's the opposite. Ds is not impressed at all! He shouts at her, snatches toys from her - evern her own toys and will lash out at her now and then.
Whenever he has hit me (he's only just starting to do this) he never hesitates to say sorry and have a hug, same with dd1, but he will never say sorry to dd2. He would rather get sent up to his room than say sorry to her.
Is it likely to be just a phase? I don't force them together but I try to get him involved with her and get him to laugh at things with her so he can see that she can be fun but it doesn't last.
What should I do with him?