In a cramped, dimly lit room, Spanish siblings engage in a forbidden dance. The bride-to-be, her heart pounding with anticipation, reaches out to her brother, her fingers tracing the outline of his growing bulge. He responds, his hands finding her curves, their bodies pressing closer. She whispers, "Before I say 'I do,' I want to know what I'm missing." He hesitates, then gives in, his hands lifting her dress, revealing her soaked panties. They kiss, their tongues tangling as they explore each other's bodies, their wedding day far from their minds.