The ordinarily silent bedroom was filled with panting, stifled moaning and the occasional giggle. Amber lay, legs spread wide, on her sister’s bed. Her back was propped up on a stack of pillows and her nightie was in her mouth. The tabby cat had spent the past two weeks training with her sister to achieve the next level of their fun little game. Before their trip to the beach, they had only licked, fingered and rubbed each other but after that day, it all changed. Claire was on a mission from the minute they had got home. During the week, they did it every morning after waking up and every night before going to bed. At first it was just fingering, then it grew to using the back end of a toothbrush (Amber at first asked whose toothbrush it was, but Claire only ever giggled. Amber could only assume that it was her own.) Two nights earlier, she began using something else. Something she claimed to have taken off their father’s last girlfriend when she moved out. Amber thought it looked weird; to her it looked a little bit like a penis, but it wasn’t anywhere near as floppy. It was a thin pink plastic toy that her sister used in place of her fingers or the toothbrush. It was like nothing else she’d experienced before. Claire pushed it in and out of her while licking her pussy and it drove little Amber crazy. In all of her eight years, no amount of cake, play or cartoons had ever given her feelings like this. Her body pulsed each time the little dildo entered her. Her tight lips gave the intruding artificial member a loving squeeze and she let out a moan through her clamped teeth. Both of her paws reached out for some more of her sister’s bedsheets to hold onto as her juvenile vagina was assaulted lovingly. “Claire!” She cried out, trying to keep her voice low, so that no one else in the house heard. Within the walls of her pussy, the dildo felt huge. For the second time that night, Amber’s entire body tensed up. She quickly pulled a pillow from behind her to moan into. If it weren’t for the muffling of the pillow, she was sure that everyone in the house would have heard. Her paws filled with bundles of sheet and closed firm, pulling the tucked in sheet out from under the mattress. A rush of slippery, clear liquid came spewed out from her vagina, leaking out around the dildo and decorating her sister’s face. She slid the dildo inside her sister and held it firm, lapping at the juices as they came forth. Amber arched her back off the bed as her body slowly began to release the tension. Her strained breath turned into exhausted panting as her sister stopped licking her. “That was incredible.” Amber whispered as she pulled the dildo out and her panties back on.. They had spent the last hour doing that and she felt that now was the best time to fall asleep. “We’re not done just yet.” Claire looked over at the cartoony digital clock that sat on their shared dresser. The time read 8:35. They still had a little while before they had to be asleep. She hopped up and ran to the door, pressing her ear against it. Claire was a very observant girl. In the silence that would normally would have filled their room at this time, she had observed a very consistent pattern. Every night their twelve-year-old brother would get up out of bed between 8:30 and 9:00 and go into the bathroom. At first, she thought that it was just that need to pee, but one night, she happened to cross paths with him. She had left her room, needing to relieve herself. She made her way to the bathroom, the door slightly ajar, letting a spear of white light illuminate the hallway. She was fairly certain that the bathroom was occupied, but she thought that she’d check, just in case. She peeked her head through the door and that’s when she saw it; her brother sat on the toilet, with their father’s iPad in one hand and the other hand... in use. She had quietly snuck away that night, but hadn’t been able to get his cock out of her mind since then. She heard the door open, despite their brother’s best efforts to do so stealthily. His footsteps were quick and soft on the carpeted floor. She faintly heard the bathroom door close and grabbed her sister by the paw. “You’re going to go into the bathroom. Max will be in there. Use what I’ve taught you.” Amber didn’t have a chance to argue before she was shoved out of the bedroom, the door shutting behind her. She turned to face the door, and had to stop herself from protesting loudly against her sister. Sighing, she made her way slowly and quietly to the bathroom. She spent a moment considering her next action. She took a deep breath, closed her eyes and rapidly snatched the door handle. With a lightning fast twist and push, she went from staring at a dark door, to staring at her brother, Max. Max sat on the toilet, with his briefs around his ankles, their father’s iPad in one hand and his penis in the other. His expression read pure fear and embarrassment. He was so surprised and embarrassed that he didn’t move a muscle. Tentatively, Amber stepped forward, close enough to get a real good look at his situation. In that moment he dropped the iPad onto the bathmat. Lit up on the screen was a video of two young sheep girls and a big, muscular stallion engaging in carnal acts. “I... I-I-I can explain.” Max stuttered nervously as he moved to stand up. Amber shook her head as an evil thought crossed her innocent mind. “Please don’t tell dad!” “I won’t.” She pulled her panties down. “If you play with me.” Max’s fear was replaced by confusion. She stepped forward, over the iPad and put both of her paws on his knees. She looked at the video, that was still playing. On the screen she witnessed the stallion sitting down, while one of the sheep rode on his lap. She grinned. From this distance, she could see his cock in great detail. It wasn’t very large, probably about two inches in length, but it was a very similar girth to the dildo. She turned around and bent over, showing off her butt and wet pussy. She paused the video and stood straight. “Lift me onto your lap.” She demanded. In any other situation, he would have protested or at the very least, contemplated his next move, but Amber had caught him at the perfect moment. The will of the boy wasn’t strong, especially when it came to his recently unearthed sexuality. He knew that if he stopped now, he would have to suffer the pain of ‘blue balls’. He lifted her up, pulling her body back along his thighs until her butt touched his penis. His eyes went wide and his cock jolted sharply at the sensation of another person touching it. He lifted her up above his member and tried to lower her onto it. She used her paw to guide his dick into her moist hole. He shuddered and gasped as the tip of his cock graced her warm folds. It easily found the hole and began parting the tight muscles. It was a lot tighter than he’d expected, but she was moist enough to let him in without too much resistance. For months he’d been using his paw to achieve his goal, but this was a new experience altogether. The moment his juvenile member sank between the walls of her pussy, he felt like he was going to cum, but the sensation sat just beyond his reach. Amber winced for a moment. His penis was a little bigger than she thought. It was a little wider than the dildo Claire had used on her earlier. It didn’t take her long to get used to the intruding phallus; Max didn’t give her very long. He began clumsily grinding into her. She pulled her nightie off as he began mating with her. He put his paws on her hips and lifted her slightly, letting gravity take over. It was like nothing else he’d ever experienced. He thrust in a fast and erratic pattern, fueled by pure sexual desire. His rapid thrusting quickly brought his breath to panting. In his ardor and speed, his cock slipped out of her a slid up along her labia. His cut cock was slick with her juices. She felt the stiff rod throbbing hard against her as he guided it back into her. She gasped as her insides were filled with his hard, pulsing meat. The boy wasted no time getting back into his unpracticed rhythm. He moaned softly, although not softly enough to stop it carrying through the tiled room. Amber didn’t know much about what they were doing, but she knew very well how she felt and what she wanted. Each time his hard little cock spread her apart and his pubescent balls struck her, she grew ever closer to what they would achieve together. She tilted her head up; her mouth drifting open and her tongue lolling out of her head. Her eyes rolled back in her head as she felt her orgasm approaching. It felt distinctly familiar to her sisterly activities, but there was something very different about it. Before she could reach the peak of her pleasure, he suddenly stopped. She felt his paws on her legs. “Get off,” he whispered loudly. I’m trying, she thought. She sighed and lifted off him, his cock popping out of her with a wet sound. Immediately she felt empty. She reached for her nightie, but before she could take it, his paws landed on her shoulders and directed her down. Her grin returned to her as she was bent over. With one paw, he held her butt steady and with the other, he guided himself in. There wasn’t a moment to adjust as his cocktip parted her wet and wanting pussy. He came up to his balls with a sudden jolt, causing his sister to gasp but before she could really feel what he had done, he’d pulled halfway out again. She began moaning steadily as he bred her in the most natural of positions. In his ardor and intense instinctive drive to mate, he hadn’t noticed the door opening. Amber had, however. She tilted her head to the side to get a look at the open door and found her sister standing in the threshold, completely naked. Claire simply watched the pair go at it like animals. For a moment, she shared a gaze with her twin sister, but her attention quickly returned to the wall in front of her and her brother behind her. She watched her sister’s face contort; a sight that she had become quite familiar with over the past few weeks. Amber’s loins were on fire. In this position, his thrusts had evened out somewhat, but they were still just as fast and primal as they’d ever been. She felt it, once more, deep in her stomach. The special feeling that she’d only ever shared with her twin. She felt the distant heat of her climax from a distance. Her eyes closed as she felt the flame growing closer. As her body began tightening around his cock, she started moaning; louder than she had before. He rode her like a stud and with stamina that seemed eternal. Her moans grew louder and louder as she grew closer and closer to her big finale. Claire noticed what she was doing as she did it and sprang into action. Before she could open her mouth to let out all of the pleasure that was building up inside in one big scream, her lips were muffled by the lips of her sister. She opened her eyes and they were filled with the fur that covered her twin’s belly. The flavor of her sister’s pussy filled her mouth as she tried to scream in pleasure. This was the point in her orgasm where Claire usually started easing up on her to let her fully experienced, but Max seemed to have far less consideration for that in mind. He kept pounding her with the same ferocity; pushing through the tightening muscles and breeding his sister’s warm, soft cavern. Once Claire felt her sister relaxing her mouth, she pulled away. “Are you close, Max?” Claire asked. He lifted his head up and was a little shocked to see Claire, but not enough to slow him down. “I cummed a minute ago.” He pulled out of the defeated girl’s vagina. Claire eyed his cock, it glistened with their combined juices. “I’m still horny, though.” Claire rolled her eyes jokingly. Amber lifted herself off the floor and touched her pussy; feeling the juices leaking from her. “I guess we could help you out a bit more.” Amber smiled. “We should go into your room, Max.” The boy grabbed the iPad excitedly, marching with his hard cock out in front of him out of the bathroom door. Taking her twin’s paw, Claire left the bathroom after him, flicking the light switch off as she went.