Intrigued by her brother's growing manhood, a curious sister can't help but explore her newfound desires. She tentatively propositions him, 'Quer experimentar?' He hesitates, then gives in, revealing his own hidden cravings. They begin to touch, their bodies pressed close, hearts pounding. She guides his hand to her breast, moaning softly, before he turns her around and enters her from behind, their taboo dance just beginning.