In the dimly lit living room, a brother and sister find themselves alone, each lost in their own thoughts. The brother, queasy from the day's stress, decides to relieve himself with a wank. As he strokes his throbbing cock, he imagines his sister, her face contorted in ecstasy, squirting her sweet nectar into his eager mouth. His strokes quicken, his breath hitches, and with a final grunt, he releases his pent-up load, fantasizing about his sister's warm cum coating his tongue.