“Shit,” Sarah swore softly under her breath. She sat on her bed, watching her sister Brittany with an almost morbid fascination. Brittany lay on her stomach on the ground, completely naked and pinning down her dog Cooper as she sucked on his large canine cock. She worked with enthusiasm, her hand pumping tirelessly while she bobbed up and down, her tongue teasing the full length of the animal’s shaft. As Sarah watched, Brittany pulled away, a victorious grin on her face.
“Yes!” Brittany exclaimed, laughing as a stream of cum exploded from Cooper’s dick, coating her face with runny dog jizz. Sarah sighed, a little impressed by her younger sister, but mostly hoping that she’d forget the…
“Looks like I win,” Brittany said, suddenly standing in front of Sarah and pulling her out of her thoughts.
“It was hardly a fair bet to begin with,” Sarah countered. “You’ve sucked Cooper off so much more than I have.”
“It’s not like I’ve ever stopped you from practicing,” Brittany replied. “And besides, you had like twenty minutes to get him off. I could see him getting bored waiting for you to give up.”