Since childhood, the parents were not at home and the siblings supported each other. Especially the sister who had just turned 20 had an abnormal amount of affection for her brother. She also had a strong sex drive and would masturbate thinking about her brother to comfort herself every day. Finally, the sister couldn't hold back anymore and spiked her brother's food with an aphrodisiac, crossing the line into incestuous FUCK! Then, when her brother said he had a girlfriend… driven mad by jealousy and lust, she spiked him again, falling into a climax of sexual intercourse!
