My older sister became a reverse bunny girl slave in three days…! JULIA WAAA-324

The older sister is both endearing and infuriating to her younger brother. Concerned about his poor academic performance, she enthusiastically becomes his tutor. "If you get a perfect score, I'll grant you anything," she promises, so he studies diligently… and ends up making her his personal bunny girl! At first, she reluctantly accepts, but the moment he utters lewd words, she sways her hips, burning with lust! She becomes increasingly submissive, offering him a breast-touching service with her fully exposed J-cup breasts! During their three days away from home, they will enjoy sex with the physically sexy older sister!