When "Tully" begins, we see Marlo (Charlize Theron) in the final days of her third pregnancy. She's brushing her son's body. He's a kindergartner with special needs. Often labeled "quirky." He's a lot to handle. She has an 8-year-old daughter. Her husband, Drew (Ron Livingston), is a work-hard, play (video game) hard dad, who appears to not be so involved with all it takes to raise a family.