It's bad for parents not to watch over their babies.
Christina is playing with her baby on her bed when the doorbell rings.
Christina wants to answer the door.
Christina picks up the baby and answers the door with her baby in her arms.
Christina runs out of the room to answer the door, leaving her baby on the bed.
Christina is able to supervise her baby while tending to other things.
Christina's baby falls off of the bed and bruises her face.