Her sister, a high school girl in the throes of puberty, was practicing sex with her drugged brother, determined to become better at being naughty! She forced his erection with handjobs and fellatio, then rode him vigorously in the cowgirl position, her inexperienced hips finding his sweet spot, making her shake with pleasure uncontrollably! Her intense movements and the sensation woke her brother up! Though surprised, the overwhelming pleasure made him unable to stop his hips, leading to a forbidden internal ejaculation and incestuous relationship!
