M.R.
hi my name is M. and my son did the same thing my daughter was born in dec of 04 and that april of 05 he turned 5 so there was almost 5 yrs apart so he was so used to having all of my attention that he had a hard time when the baby came so i did the same thing i made a night where it was just me and him i tryed to involve him in playtime with the baby and i would praise him when he did something nice for his sister with out being told like if he picked up her bottle when she dropped it etc. it will get better she is now going to be 2 next month and they love each other so much he still has his days where he isn't nice to her if he is trying to do something and she is getting into his stuff but i tell him that she loves him and just wants to do what he is doing so he will give her a toy and let her sit with him so it will pass you just have to hang in there