Mel, it was relatively "easy" for us as we moved house when I was 6 months pg, so could plan Olivia's new room well ahead of Charlie's arrival. But we did "pinch" a number of her bits of furniture for Charlie, & I was scared she would feel "usurped" as she realised "her" changetable etc were being used for him. But it hasn't been an issue at all.

I think if you give it plenty of time and planning, Jacob will be fine.