Organicem - My little sister is only 3 years older then my son and it is great when we go over and they can play together and stuff and its fun having big get togethers there. I have and older sis 24 and younger one whos 20 then my mum had my brother whos now 9 and my sis is 6 to the same father so i found it weird. I did find it hard though because my mum isnt very nanaish so i sometimes feel my kids miss out on that grandparent relationship because she has little ones of her own.
I know what you mean. Currently I have 5 siblings ranging from 21 to 6 so there is a 4 year gap between my little brother and my DD1 and there will be 5 months between DD2 and the new arrival.