With his heart racing, he watched his stepsister, her lips wrapped around the impossibly large dildo, her eyes locked with his. The sight filled him with a mix of lust and awe, his cock throbbing in his pants. As she expertly worked the toy, her expressions of pleasure and desire heightened his own. Suddenly, she pulled the dildo out of her mouth and smiled, a mischievous glint in her eye. With one fluid motion, she climbed onto his lap, straddling him, her wet pussy brushing against his hard length. She lowered herself onto the dildo again, moaning, her hips grinding against his, their bodies connecting in a primal dance of passion and need. He knew she was his now, his new girlfriend, and he would give her anything she desired.