Zubin, the elder sibling, watches his sister's lips wrap around his throbbing cock, her eyes locked onto his. She's tentative at first, but soon finds a rhythm, her hand pumping his shaft in time with her mouth. Her saliva coats him, making her motions smoother, more urgent. She moans around him, the vibrations sending shivers down his spine. He can feel his climax building, his balls tightening as she takes him deeper, her throat convulsing around his length. He grunts, his hands gripping her head as he spills into her mouth, his sister eagerly swallowing every drop.