In the dimly lit family home, siblings Ale and Maria find themselves alone, their parents away. Bored and curious, Ale starts to stroke his growing erection, his mind filled with thoughts of his sister's luscious curves. Maria, noticing his bulge, can't help but feel a twinge of excitement. She teasingly asks him to show her, and as he reveals his throbbing cock, she can't resist the urge to touch it, her fingers gently caressing his shaft. Their taboo game of exploration begins, their bodies aching for more.