This has to be a growth spurt.
We drove to her belly dancing class last night. Molly was even wearing the new belly dancing costume Grandma Lucille made her for her birthday to show her teacher. Halfway across the parking lot she bursts into tears (I swear she was smiley and chatty two seconds before) and tells me she wants to go home because she's tired. Molly then falls asleep on the drive home. She was in bed for the night by 7:45 pm. Little one slept through until 9:30 am this morning!!!