A mother who has been feeling sexually frustrated lately. When she drinks a mysterious supplement (aphrodisiac) given to her by her neighbor's wife, her vagina suddenly starts to ache, and she's in trouble! She tries to relieve the ache by masturbating, but the ache doesn't go away. "I might as well give this aphrodisiac to my son," says the mother, secretly putting the aphrodisiac in her son's drink. After that, the mother and son...