My mom Momoka has big breasts. But even so, she always dresses carelessly around the house. Today, while I was massaging her shoulders, her exposed cleavage made me fantasize about something naughty. I had no choice but to masturbate using her underwear as a stimulant, but of all things, my mom found me. No more excuses, I confessed to my mom that I was lusting after her, and she gently wrapped my erect penis in her vaginal walls, calling it a lesson in sex. Recorded in digital mosaic.