Tension builds between a curious teen sister and her unsuspecting brother. She's never seen a real cock before, but her curiosity gets the best of her. She approaches him, asking if he needs help "releasing tension." He's hesitant at first, but her innocent eyes and innocent demeanor win him over. She takes his throbbing dick in her small hand, marveling at its size. She tentatively licks the tip, tasting the pre-cum, before taking it all in her mouth. Her inexperience shows, but her enthusiasm is infectious. She gags slightly, but perseveres, eager to please her brother and ease his tension.