Yumi was having a good time with her son, although she was feeling lonely due to her husband's sudden assignment. One day she sees her son's morning erection and she finds out that his cock is incomparable to her husband's. Yumi has always been obsessed with big cocks, and from that day on she had her head full of her son's cock. She eventually becomes impatient...and eventually takes her son's virginity. Even though she knew that she was wrong, she became more and more captivated by the big cock.
