Sara looked so pretty with her soft curls pulled back into a pair of loose braids, one over each shoulder. Her low-rise jean shorts were tight-fitting and her t-shirt was a dark green that offset her eyes and bared a thin strip of pale tummy. She wore no bra or panties – they were not allowed, per Rebecca’s Vacation Rules. Rebecca had many Vacation Rules, and Sara was still getting used to them, even after having been here for three days already. She remembered the first time she forgot to start her morning by taking a birth control pill out of the package that had been bought for her and throw it away in front of Rebecca. The older woman had been lenient then, but the second day, well, Sara had been stripped naked, bound to the front gate, blindfolded and was left there for anyone who passed by on the road to see. Once every half hour or so, Rebecca would come out and give Sara a drink of water, and smack her tits or ass, give her a kiss and then leave. Rebecca also made sure to take photos of the girl, from the rear, when traffic was passing, so she had proof of Sara’s exhibitionism. By the third day, Sara was remembering to throw away the pill. Rebecca wanted to reward Sara for remembering, so after the girls took a leisurely lunch, they took a walk out to the stables. “I know you like horses, Sara, that’s why I thought of bringing you to this ranch.” The younger girl smiled at the kind gesture. “So, as a reward for tossing your pill today, I’m going to let you cum. Once.” Sara stood, confused. They weren’t going horse back riding? Why come to the stables at all? Rolling around in the hay was far itchier and less comfortable than the bed they shared in the ranch’s spare bedroom. Rebecca smiled at Sara. “Get on your knees, slut.” She said, and Sara obeyed. Sara knew if she didn’t do as Rebecca said, the first time she said it, something bad would happen. Or worse, she wouldn’t get to cum that day! Rebecca walked over to one of the horses, a large mare, and tugged his bridle till he plodded over to Sara. “Okay, Sara. Get under him. I want you to suck his cock. Show me how much you love horses.” Sara was appalled, and hesitated for a moment. Rebecca saw the hesitation, and without thinking twice smacked Sara across her back with the riding crop she was holding. “Show me how much you love horses, slut!” Rebecca demanded again, and this time, Sara scooped up the large horse cock in her hands and placed it in her mouth. Slowly she worked the massive meat in and out of her throat, licking its length and choking on its fullness. Slowly it expanded in her throat, nearly suffocating her. Old horse cock was surely never designed to be shoved down fifteen year old throats. Rebecca petted Sara’s hair as the young girl sucked, getting more into what she was doing. She would prove how much she loved horses, she wanted to cum! She needed to cum. Sara hadn’t cum since her daddy took her virginity a week ago, and it was slowly driving her to the brink of insanity. Without warning, Rebecca smacked Sara with the riding crop again, only softer this time, and across fleshier meat. Sara’s ass stung, but warmed up quickly to the hurt. Every 20 seconds or so another swat would touch her through her jeans, the tight fabric dulling the pain. She was worked up, sucking the horse with determination and slowly was loosing herself in the moment of masochistic bestiality. A minute later Sara was over the top, and as she came, the horse let loose in her throat and she swallowed down every last bit of it with enthusiasm. Rebecca looked at the girl through the lens of the camera as she taped the event. “Master will be pleased, Sara. However, I don’t like fucking animals, and he’s always wanted to see me do it. I’m going to use you as a surrogate, so I can make him happy. I think the owners of the ranch have a dog or two, I’ve seen them running around. I want you to go out and find one, and bring it back in here so it can fuck your filthy cunt.” Sara stood up to do as she had been asked, but Rebecca cut her off. “I never told you to stand. Crawl, like a bitch in heat. Go on, now, go.” Rebecca sat, with the camera waiting, while Sara went to round up one of the ranch’s random mutts. The brunette crawled back in about 10 minutes later, with a large mixed breed in tow. Rebecca ordered Sara to strip, and the girl did so without a word. The hesitation however, was plain to see on her face. Rebecca smiled, happy that Sara was behaving so well today. Setting the camera down for a moment, Rebecca strutted over to Sara, and petted her on the head. “You are a good little bitch.” She cooed. Rebecca grabbed the dog by the scruff of his neck and pulled him in front of the trembling girl. “Suck him hard. Let him know how much you want him to fuck you.” Sara lied on her back in the hay and scooted her body under the dog, which was held in place by Rebecca. Sara took the limp dog cock in her hands and began to swirl her tongue along the head, coaxing it out of its furry home. The beast stayed in place, panting heavily as Sara worked his muscle with her lips, and Rebecca regained possession of the camera and began to snap digital photos for her Master. When the canine was stiff and panting and beginning to shake, Rebecca commanded Sara to come out from under the dog and get on all fours, low to the ground. The girl complied, and soon the dog was mounted behind her, paws on her back, thrusting his cock deep into her young pussy. The dog swelled inside her, making it difficult for him to slide in and out, and instead the beast simply pumped himself in further and further until young Sara was screaming in pain. Rebecca video taped the entire animal-fuck. She knew she’d be well rewarded for these pictures and videos and smiled to herself as the younger girl took to being a slut better than Rebecca had ever hoped. The mixed-breed mutt dumped his load in the young cunt then hopped off her, strutting out of the stable. Sara slumped to the floor, crying. Rebecca grabbed her by the hair and dragged her to her knees. “Smile, and thank my Master for the honor of pleasing him.” Rebecca zoomed in the camera into Sara’s tear-streaked face, and the pale brunette’s green eyes glistened in the dim stable light. “Thank you, Master, for the honor of letting me please you in this way.” She choked on the words, gulping down air, and it was simply beautiful. “You are such a good little slut, Sara. Now, go shower and clean up, you smell like a nasty bitch and you’re dripping dog cum down your thighs. You should really know better than to let any escape.” The girl nodded and, picking up her clothes without putting them on, left the stable to go back to the ranch house. Rebecca turned the camera off, and followed Sara inside to download the photos to her Master’s laptop, so she could bring them home to him. She could only imagine the lovely things he would do to her when he saw his gift. - - - -