In the sultry heat of a Portuguese afternoon, a married woman, her husband away, finds solace in her primo's company. Their laughter turns flirtatious as they share a bottle of vinho verde. The wife, in a low-cut blouse, feels her primo's gaze on her cleavage, igniting a spark. She leans in, whispering, "You know we shouldn't..." but her words trail off, inviting his touch. He obliges, cupping her breast, feeling her nipple harden. She moans softly, guiding his hand under her skirt, his fingers finding her wetness. They undress each other hurriedly, their bodies entwined, sweat mingling as they fuck passionately on the bedroom floor.