She then took their infant son Kyle and put him in the back of Derek's car, leading the couple to believe Kyle was kidnapped before Derek found him. Derek considered getting a restraining order on Lisa, but didn't go through with it when he learned from Reese that Lisa's sister took her to San Francisco with her.īut one night three months later, while Derek and Sharon were reconciling over dinner, Lisa came to the house and told their babysitter Samantha that she was a friend of Sharon's, even faking a phone call to her. Derek talked with the detective, denying all of Lisa's claims. She also gave her a diary detailing their fabricated sexual experiences. Meanwhile, Lisa sent herself flowers using Derek's credit card information, as well as claiming to Detective Reese that they had sex at the hotel room. Detective Reese relayed this information to Derek and his wife Sharon along with the fact that Lisa gave the doctor his name and number in case of emergencies, tearing a rift in Derek and Sharon's marriage that resulted in Sharon kicking him out of the house. Derek called an ambulance and it was at the hospital that Lisa claimed to Detective Monica Reese that she and Derek were having an affair. Later on, Derek returned to his hotel room and found Lisa on his bed, having attempted to commit suicide by overdosing on pills. Lisa had Derek called out of a meeting the next morning by claiming to be his wife, where Derek finally confronted her and told her that there would never be anything between them, upsetting the psychotic temptress. She also drugged Derek's drink and broke into his hotel room when he returned, raping the incapacitated Derek. During a work retreat, Lisa approached Derek, believing that Derek only rejected her to protect his career. When Derek emailed her back saying to leave him alone, she only responded with a smiley face.
But on New Year's Eve, Lisa sent Derek an email containing many risque pictures of her. Derek was about to report Lisa to Human Resources, but learned there that Lisa had quit her job at the company, making him think the problem was solved. Lisa later approached Derek in his car and flashed him, but Derek immediately forced her out of his car, angering her. His comfort led the delusional Lisa to believe he reciprocated her feelings, and she made her feelings known by sexually accosting him in the bathroom during a company Christmas party, which Derek rejected. Lisa also became friends with Derek's co-worker Patrick.ĭerek acted friendly towards Lisa and also comforted her when he found her crying in the break room, claiming to have just been broken up with. She began listening in on Derek's office phone calls, looking through his office, and it is implied that she began poisoning office employees to make them sick so she could keep working with him. She instantly became fixated on Derek and began scheming to be close to him. She was a temp worker for the finance company that Derek Charles worked at, and she first met the businessman in the elevator of the building. Lisa Sheridan (Ali Larter) was the villainess of the 2009 thriller Obsessed.