After divorcing my husband shortly after my son Satoshi was born, it became just the two of us. I always tried to stay cheerful in front of him, but deep down, I was filled with loneliness. One day, when I picked up Satoshi's bath towel and went to the bathroom, I realized he had already grown into a full-grown man. That sight deeply stirred my emotions, and even after returning to my own room, I couldn't get the image out of my mind—leading me to indulge in masturbation. All the while, I remained unaware that he had noticed...