My boys are 2.5 years apart but we are due with our girl in two months when DS#2 is only 15 months. DS#2 is still in the crib and shows no sign of wanting/needing to move into a toddler or twin bed. DS#1 was climbing out of his crib by 13 months so he moved to a toddler bed by 14 months. I want to have the nursery ready for DD when she is 3-4 months old but I'm not sure when to move DS#2 upstairs with DS#1. I'm worried about how DS#2 will deal with having a baby in the house as well moving to share a room with his older brother. Any suggestions?