JUL-403 Accidentally saw my best friend's mother masturbating and the ending

Her husband passed away three years ago, and her mother Momoko raised her son Kazuya strictly alone. However, her grades did not improve at all, and her frustration began to accumulate due to academic stress. I couldn't stand the confiscated vibe from my son's friend Shunsuke and indulged in masturbation. Coincidentally, Shunsuke witnessed this... Momoko, who lost control of her sexual desire due to masturbation, instead of scolding him, grabbed his erect cock and started to fuck him.