All of them got a vacation after Si-Yun scored great on Mock Exams! Its a Villa with a Swimming Pool. Ji-Hyeon is the 1st to strike Si-Yun & they have sex while, Su-Min is listening them having sex, standing outside the room. She is also getting turned on & starts fingering her pussy!
Cuck play with her husband in the hotel room, they kick him out and she shows her husband the recordings later. After that Park Jun-Hyeon fucks her in her office.