HKD-137 Cum inside from son to grandson, Emi Endo

Once, Emi lived with her son and his family and grandchildren in this house. Now she lives alone. Sometimes her son or grandson comes home, but usually, she lives alone and feels lonely. Her joys are watching TV and... daily masturbation. Today, she is excited thinking about what to use as a prop for her masturbation. One day, while Emi was using a vibrator for masturbation, her son Hiroshi came home. Hiroshi accidentally saw his mother masturbating and involuntarily got an erection. Then the two of them...