Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: Jess a female lawyer, is a single and overly concerned mother of a 15-year-old teenage girl, Sara.  She becomes even more overprotective and overbearing when Sara tells her that she is thinking about having sex with her boyfriend Chad. One day during court, Jess meets Alex Lofton a heart surgeon from Atlanta Georgia, who is currently separated from his wife and has two children.  During a dinner meeting the two begin to talk to each other, and soon begin a passionate affair, with Jess keeping it a secret from Sara.  A week before Thanksgiving Jess and Alex meet at a hotel in Chicago and have sex, after which Alex admits that he has fallen in love with Jess, but has decided to go back to Atlanta and his children, which breaks Jess' heart.   During Thanksgiving, Jess begins to feel sick and secretly buys a pregnancy test from the pharmacy. The test reveals that she got pregnant from her final encounter with Alex, which she tries to hide from Sara by throwing the test in the garbage, but the Sara later finds it and Jess confesses.  A few days later, Jess catches Sara during a sexual encounter with Chad in her bedroom. She kicks Chad out and tries to grounds Sara, but Sara decides to leave and go live with her father and stepmom since her mom was being a hypocrite.  A couple of nights later, Sara goes to a party with her friend Tyler, and catches Chad having sex with Tyler's girlfriend Leeza. Sara leaves the party, returns home to Jess, and they reconcile.  A few months later, Jess goes into labor, and gives birth to a baby boy she decides to name Jake, after her father, who passed away some time ago. Sara promises to help her take care of Jake.
A:
Who walks in on her daughter having sex with Chad?