Serena, the hot teen step-sister, teases her stepbrother Peter mercilessly, denying his advances yet leaving him craving more. One day, she corners him, her eyes filled with lust. "You're right," she purrs, "it's not inappropriate, I'm your step-sis." She unzips his pants, revealing his throbbing cock, and takes it in her mouth, expertly teasing him. Peter, overcome with desire, grabs her hair, fucking her mouth until she gags. She responds with a sultry smile, ready for more.