In the dimly lit hallway, stepbrother's eyes widen as he spots his stepsister, dressed in a revealing costume, bent over to pick up a fallen costume piece, her ass prominently displayed. His hard-on strains against his jeans. She catches him staring, then smirks, sauntering towards him. "You like what you see, stepbro?" she teases. He swallows hard, his eyes locked on her ample cleavage. She takes his hand, leading him to her room, where she pushes him onto the bed, unzipping her costume to reveal her naked body. "Let's make this Halloween one to remember," she purrs, straddling him.