When I was little, my father left after his business failed, leaving me to live alone with my mother. One day, a older boy named Ryuji started helping around the house, bringing major changes to our lives. One day, I accidentally saw my mother having her big tits groped by Ryuji, her face twisted as she moaned lewdly. From then on, I kept watching the two of them having sex, secretly peeping whenever I could. I saw how my milf mother lost herself repeatedly to Ryuji's cock, gradually starting to crave him herself, blushing as she rocked her hips. That scene left a deep impression on me, one I could never forget.