The soft rustle of sheets and the gentle weight on his side rouse him from his sleep. His sister-in-law, her eyes gleaming in the moonlight, has joined him in his bed. She's wearing nothing but a thin, see-through negligee, her body barely concealed. She leans in, her breath heavy with desire, and begins to rub against him. He can feel her heat, her wetness through the fabric, her movements skillful and teasing, pushing him to the brink of surrender.