Ava and Lola share a room

KiKi (Brian's mom) offered to keep Ava a few nights when we were leaving the day after Christmas. Of course we said yes. With Ava gone Lola slept in Ava's room in her pack and play. She usually sleeps in Brian's music room wedged into Brian's desk. Now with Ava home I asked Ava if she wanted Lola to sleep in the same room with her. Ava was so excited. Now 20 minutes into it, Lola is crying and Ava keeps singing Jingle Bells to her in hopes to make her happy. As soon as Lola stops crying so does the singing. Once Lola starts up again, the singing does too. Sweet Ava is trying to keep her sister happy. I'm not sure if this will work, I hope so because I really need them to share a room in the new house in a month!