Believe me, I know how difficult that situation can be. We were in two different apartments (a 2 bedroom and the a 3 bedroom) until just a couple of weeks ago when we finally got our house. I've always been lucky that my daughter has been independent and that my son has always LOVED sleeping. But, I'm sure things will be difficult once I have baby #3 this December! My kids are perfect little monsters and keeping the noise down and away from the baby's room is definitely going to be a challenge!Can you find ways to make her your helper? Audrey has always been very involved with Harrison. Right from the start we had her bringing us bottles and blankets, she'd give him his pacifier when he dropped it, bring him toys, etc. Let her be a part of the nap time routine. If she's a helper she may start to understand exactly what's going on and she may be more considerate during his naps. Helping with the care and routines made my daughter a great, well behaved big sister.But for as easy as things were for me, there were plenty of times that were awful. One night my husband was out with friends and Audrey was in the beginning of her potty training. She was in her room looking at books while I was getting Harrison to sleep. My husband was calling on the phone, Audrey was flipping out because she needed to poop and Harrison wasn't asleep. I left him awake in his crib and he cried to much her threw up after being alone for two minutes. My only other advice is to wait it out. One of your kids will adjust. Either your daughter will learn to be quieter or your son will learn to sleep through the noise. It's not easy having two little ones but be patient and things will work out eventually.