German sister and brother, Lunitasex and Lunitosex, find themselves in a heated exchange. Lunitasex, fed up with her boyfriend's tiny penis, confides in her brother about her sexual frustrations. He listens, his cock growing hard at her explicit words. She notices, a wicked grin spreading across her face. She leans in, her hand reaching for his bulge, "Let's see if you measure up," she whispers. He groans as she frees his massive, throbbing cock, her tiny hand struggling to wrap around it. She strokes him, her eyes locked with his, before slowly taking him into her mouth, eager to taste her brother's delicious manhood.