Task: Question Answering
Input (English): Passage: Kate Hannah, an elementary school teacher, arrives at work hungover and vomits in front of her class. Asked by a student if she is pregnant, she pretends she is, then continues the lie to the school principal, Mrs. Barnes (Megan Mullally). Her co-worker Dave reveals that he knows she has been drinking and she makes him swear not to tell anyone.
Attending a party with her husband Charlie and his brother Owen, Kate drinks heavily. While leaving, she meets a woman who asks Kate for a ride. Kate is offered crack and the two get high together. The next morning, Kate wakes alone on the street. She finds her car and drives home, where Charlie acknowledges they both are alcoholics. They get intoxicated and have sex before Charlie passes out. Kate heads out alone to buy wine but is turned down by the cashier. She urinates on the floor because the bathroom door is locked, then steals a bottle of wine.
Waking up, Kate realizes she has passed out again. At work, Dave, a recovering alcoholic, invites her to an Alcoholics Anonymous meeting. There, she befriends Jenny, who has chosen a passion for food and cooking over alcohol. Kate decides to become sober and change her life. Dave drives Kate home, but bluntly makes an offensive comment which upsets her. When Kate and Charlie visit her estranged alcoholic mother, Rochelle, Kate mentions the AA meetings but Rochelle is skeptical; Kate's father left them after getting sober and now lives in another state with his "shiny new family". 
Question: Who has sex?
Output (English): Charlie.