Crying Baby

Till now Cerilynn still sleep in my room but in her bb cot. But ever since we had change our bed to king size, she started giving excuses to sleep with us.
yesterday, she again wanted to sleep at our bed and she said:
C: Mommy, i am still a baby so i must sleep in your bed
M: baby? than you must cry like a baby
C: "ong gey ong gey" and she started to cry like a baby 0_0

Hopefully she can keep to the promise...Sleep at her own room at 4yr old!