Jinhee barges into the shower while her brother was still masturbating. She shamelessly takes off her panties & tells him to hurry out so she can shower, leaving him fantasizing about doing her on the spot.
Sunmi wakes up to find herself all tied up in her bedroom. Junho is in total control now and he teases his mom to the point of orgasm, and when she asks for it, he leaves her hanging to make her long for him even more.