HMN-150 The son silently watched his father fuck his tutor

My tutor, Mina-sensei is my father's lover! My mother was attending a tea ceremony class every Saturday. Taking this opportunity, my father asked Mina-sensei to tutor me, so that the two of them could more easily secretly fuck each other! And from then on, every time Mina-sensei came to teach me a lesson, she would use the excuse to go out and have sex with her dad! Because it happened many times, I got suspicious and followed sensei so I witnessed them fucking each other. Not only that, my dad ejaculated all over her pussy every time. With that much, sensei will definitely get pregnant! And during a peek at the two of them, Mina-sensei also discovered me, but not only did she not stop, she also intentionally moaned louder. Afterwards, Mina-sensei offered me a handjob so I could keep it a secret. I agreed and the wrong love affair between the tutor and my father continued. But in the end, I couldn't take it anymore! I also want to fuck this beautiful and sexy tutor! Waiting for my dad to get tired of fucking her and then go to sleep, I went to ask Mina-sensei for permission to fuck her. Mina-sensei agreed but with one condition, I must be top of the class in the next exam...