GG-272 - Older sister's real sex education, getting bolder after being caught

Round 1: Very ordinary H. -Little brother interrupts (or interferes?). Round 2: A sex-ed style flow. -Masturbation in the bath. Round 3: A second sex-ed style feel. Then the main event. I just couldn't get excited. During rounds 1-2, there were noticeable bruise-like marks on her skin here and there... I don't know how old the little brother is supposed to be (lol), and the dialogue wasn't exciting either. I usually like this actress, but this work in particular was lackluster. If there had been a scene where the brother was peeking at her masturbating in the bath, it might have felt more realistic.