A sister's passion for her brother's thick, veiny cock is insatiable. She craves the taste of his salty, creamy load, and today, she's determined to get it. Kneeling before him, she takes his length into her mouth, her cheeks hollowing as she sucks. He grunts, fucking her face, his hands fisting her hair. She gags, tears streaming down her face, but she loves the challenge. His cock swells, and she feels the first spurt of cum hit the back of her throat. She swallows eagerly, milking him for every drop, her eyes locked onto his, satisfying them both in their taboo desire.