A.S.
I think you would be fine to leave her until she really is acting like she wants to be out of the crib. I have three children 3,2, 10months and I didn't move my oldest out of his crib until a few months after the 3 baby came and we haven't had to many problems. He didn't have any need to stay in the crib cause he saw the baby or his other sister in one. I think you would be fine to keep her in her crib so that you can all have some good rest. Just remember she is only 2 and in some families she is still consider a baby. I have to remind myself of that cause I have just kinda thought they are the older sibling...but in many ways she is still little and maybe she feels more comfort being in a crib. I know all of my kids have, I tried for about two days with my now 2 year old and then went back to the crib and she is doing just fine in there and I am not going to give it a try again until she starts trying to climb out. I hope that helped you out some and good luck with the two of them...I promise it won't be as hard as you might think.