What happens when Emily beeps the horn and waves Becca, Taylor, and TeeTee to the car?

Becca, Taylor, and TeeTee stand at the doorway of the school hesitating to go out in the rain. Emily beeps the horn and waves the girls over. They do not come at first. Then Emily cracks her window and shouts to them that she is Patina's aunt, and the girls come running to the car.