Cal fumbled a man in the body of a dog screwing his sister.
"Come on boy." She smacked her ass again. Cal sprung up and instantly mounted her. "Oooo, that's a good boy," Katy said amusingly. She watched as Cal began to thrust forward, trying to enter his bitch. The first two thrusts missed to the left and right of her opening. Katy was just about to reach a hand back to help Cal, but on his third thrust, Cal hit his mark. She gasped as Cal's doggy dick was pushed into her pussy. Cal immediately started to fuck Katy at a very rapid pace. Cal's front legs slipped down above Katy's hips in order to give him more ramming power.
"Ugh, good...doggy...such...a...good...doggy..." Katy managed to gasp. Cal was fucking her so fast that she was already about to come for the first time, only a minuet into the fucking. "Oh...shit...I'm...cumming," Katy barked. Her pussy shook and Katy shivered in pleasure as she came on Cal's dick. Katy smiled as she was in bliss, but the session wasn't over. Cal hadn't cum yet; he hadn't even tied with Julia yet, so he was still going. He kept pounding away at his sister's pussy. Soon, Katy could feel his knot begin to bang up against her pussy, causing little spurts of both pain and pleasure. "Ugh...fuck...doggy...fuck...ugh...fuck...fuck...me...doggy," she managed to gasp. Cal starting to pant harder and harder which was a sign that he himself was coming closer and closer to cumming. Julia moaned as she closed her eyes and tilted her head back in pleasure.
And then, suddenly, Cal pushed his body forward and his knot popped into Katy's pussy. She screamed as she felt his large knot stretch her cunt as far as she thought it could go. Cal tugged a couple of times, and then he blew his load. Julia felt her insides fill up with the dog's hot cum.