My DD regularly did that when I was pg with DS, but in the car this morning, she (now 2.11) asked whether we'd have a new baby when 'DS goes back' . It's the first time she's ever said anything like that, and DS is 14 months old! When I suggested that we might keep DS as he was her brother and we'd miss him, she thought 'that would be alright'. They are funny little things sometimes
DS1 tells us we ARE having another baby, and it will be called Pop! He says 'when you go into hospital to have Pop...' and 'Pop will do that when she's tiny' etc. etc. Oh dear, I think he may be disappointed. At least it must mean they don't hate their siblings.