I am having sex with my son's friend. (Kato Hino ADN-544)

After my father's death, my childhood friend Teppei lived with his mother, Hino. Hino was beautiful and unguarded... I felt confused, and sometimes my heart would race. One night, I stayed at Teppei's house and noticed a dim light in Hino's bedroom. Although I knew I shouldn't, I still peeked in and found Hino alone. I couldn't resist, so I assaulted Hino.