Advice...please

When is a good time to put the girls into the same room together?

I think it would be better sooner then later, but I'm not sure how to handle the transition. Whitney is easy to put to bed now, but it may be different when Brooke is in there with her. I know it will be rough for awhile so I want to make sure to do it right so the transition doesn't last longer then it has to. I'm keeping Whitney in her crib, at least til summertime. I have a pack'n'play for Brooke to sleep in. I'll worry about putting Whitney in a toddler bed later. Any advice from any of you whether you've had to do this or not would be helpful.

Brooke- two months old

Brooke turned two months old a week ago. She is such a little doll. She already goes to sleep on her own, in her own crib(unless I fall asleep nursing her in our bed). She hardly ever cries, and when she does it's because she's sleepy or hungry. I already know her sleep schedule, which is nice so I can kind of plan my day around naps for both girls. Brooke loves to be swaddled really tight to sleep, Whitney hated it. It really hasn't been too hard to transition to having two kids, but I think it's because I am more aware this time around and I can recognize when my baby is sleepy or hungry. Poor Whitney, I hope she's not damaged from being the first kid. Brooke is starting to smile and interact more, when we play with her. Her smiles are so rewarding.

At Brooke's Dr. appointment on Monday she was weighed and measured.

Her head was 15.1 inches around (39th percentile)
She weighed 10.89 lbs(52nd percentile)
Her body measured 23.9 inches long(94th percentile)WOW!