After a tense argument, siblings find themselves alone, the air thick with unspoken tension. The brother, his cock straining against his pants, can't help but notice his sister's lingering gaze. She bites her lip, her eyes flicking down to his crotch, and that's all the encouragement he needs. He steps closer, his hand cupping her cheek, his thumb brushing her lips. She parts them, sucking his thumb into her mouth, her eyes never leaving his. He groans, his other hand moving to her breast, squeezing it through her thin shirt. She moans, the sound making his cock twitch. He leans in, his lips brushing hers, and she opens her mouth, inviting him in. They kiss, their tongues dancing, their hands exploring, their bodies pressing together, hungry for more.