The friend's eyes widen in surprise and delight as she takes in the size of her stepsister's friend's cock. She can't resist the urge to taste it, to feel it stretching her mouth and hitting the back of her throat. She takes her time, licking and sucking, her hands exploring his balls and shaft. She's eager to please, to show him what a good girl she can be, and the sloppy, wet sounds of her mouth on his cock fill the room.