We probably ned to move DS2 to DS1's room before #3 arrives. We had planned to do this eventually, but didn't expect to have such a close age gap between #2 and #3. DS2 will be 22 months when #3 arrives. I imagine he'll be napping and DS1 does not nap. Also, DS1 goes to bed later than DS2, but sleeps later.

Did you switch up schedules when you had your kids start sharing rooms? Or just let them have different schedules? Did one wake up the other in the mornings?