I have no first-hand experience with this however one of the girls who works for us recently had her second child. Her first was 1 when her second was born. In the last few months of her pregnancy her DS would get very upset when you even mentioned that he would soon be a big brother. He would turn his head and sulk. He would refuse to cuddle Mummy's belly and if you asked him where the baby was well he'd just walk away with a big frown on his face.

Needless to say that his mum was really worried about how she would handle two little ones if DS wasn't going to co-operate. She didn't have to worry. As soon as DD was born her DS was mesmerised by her. He absolutely loves her and won't let his little sister out of his site. He's always asking for her and when you now ask him if he's a big brother his face lites up and he's very proud.

I know this isn't the case with everyone but maybe your DS will settle into his new Big brother role easier than you think when the time comes.

Good Luck.