When Callie returns from grocery shopping, she shows Jessie the cartons of milk she bought. When she picks them up one by one in one hand and sets them back down, it's obvious that the cartons are empty.
When Callie runs out to her boyfriend's car screaming at him, she is carrying her baby Jason in her arms. As she kicks and lunges at the car, in some scenes it's noticeable that she is carrying a doll, not a real baby.