"Go listen to baby's heartbeep"

Mommy took Aubrey to one of Mommy's last OB appointments before the arrival of Baby Girl Nash #2. Although Aubrey had been to Mommy's Dr. before and listened to the baby's "heartbeep" (as Aubrey calls it) from across the room, the nurse let Aubrey help find it with the monitor this time while Mommy and another nurse filmed it. Aubrey now exclaims "go listen to baby's heartbeep" when I tell her we need to get in the car to go to Mommy's Dr.