[NON-CONSECUTIVE] Jinhee tries to get off by masturbating alone in the bathroom but it's not enough. She accidentally goes into her Sangyeo's room thinking it's hers, only to find her brother's rock-hard dick towering above anything. At that moment, boundaries became meaningless, as she let go of reason & started acting according to her instinct, full of repressed lust that has been neglected for very long time. She finally gets off after using her sleeping virgin brother to her heart's content.
Yu-Ri leaves her husband alone for days to be at her parent's home to clear her head. She had called Yu-Mi in advance to take care of him in the meantime. Su-Heon takes the opportunity to make advances on her.
Hwi-Hyeon bought the Original House of Yun-Gyeong & gave back the house to her. They are doing the deed in the living room. Yun-Gyeong is very active during the sex, Hwi-Hyeon is fucking her Rough & Hard.
Flashback: Hwi-Hyeon saw Yun-Gyeong having sex with her Husband when he was a Teenager. Both saw each other & it turned her on even more.