If you have two under two, how did you do your LO's sleeping arrangements? Did you keep LO #1 in the crib or move to toddler/big girl bed to make room for LO #2? Do you have them sharing the nursery or did you give them separate rooms?

My LO will be 20 months when LO #2 arrives. I'm planning on keeping the baby with me in the rock and play for about four months. I have a third bedroom that right now has a double guest bed in it, I'm thinking of keeping it up while my new LO is a newborn for sleepless nights. But then part of me wants to just go ahead and get a twin bed ready for LO #1. I know it will work out, just open to advice...