With a eager hunger, the stepsister leans in, her tongue flickering out to lick the head of her stepbrother's throbbing cock. She takes him deep, her throat convulsing as she struggles to take every inch. She gags, saliva dripping down her chin, but she's determined to please him. Her eyes water as she looks up at him, her mouth stuffed full. He groans, his hands tangling in her hair, guiding her head as she bobs up and down. The sound of her slurping fills the room, her saliva making his cock glisten. She can feel him getting close, his cock pulsing in her mouth. She braces herself, her eyes widening as he explodes, his hot cum filling her mouth. She swallows every drop, her tongue licking her lips clean.