He looked at the dog and shouted, "Rex, stop!" And the dog stopped and sat down.
Jeff walked around to face his sister. He stooped down and adjusted the chin rest slightly. He walked back, unhooked Rex's leash and brought the dog to Deb's face. Jeff lifted the two front paws of the large dog and placed them on his sister's shoulders. Deb's face was only inches from the dog's large sheathed cock. As she looked she saw the wet red tip of the dog's cock slide from it's sheath.
"As you can see, you have already started to excited him. I must insist that you bring him to a point, that he can satisfy himself in another way."
Jeff reached under the dog and rubbed the dog's balls with one hand and stroked his sheath with the other. Deb watched as the dog's cock slipped out of the sheath and touched her lips. As her brother continued his manipulations the dog moved forward and his cock entered Deb's mouth.
Jeff stopped and watched as his dog took over, pumping his own swelling cock into Deb's mouth. Rex would give two of three quick pumps and then stop. Two or three more and shift his stance.
Deb couldn't believe she was sucking the cock of a dog. She was amazed at the size of it. It was so big around that it stretched the lips of her mouth to where it almost hurt. She had never seen a dog's cock before. Especially this close. It was amazing to see, and so slippery in her mouth. It was pointed at the beginning, thick in the middle and tapered back to a large ball where it met the dog's sheath.
Rex was really getting into fucking her mouth now. The dog's cock was sliding almost all the way in and out of her lips with each quick stroke the dog took. She was beginning to wonder what it would feel like to be fucked with this thing. She felt her pussy getting wet and she couldn't stop wiggling her ass even though there was nothing to wiggle it at.
Just as the dog started picking up the pace, and Deb was sure it was going to cum in her mouth, Jeff shouted, "Rex, stop!" and Rex jumped off her shoulders and on to the ground. Rex immediately starting licking himself, and Deb thought that this was what her brother meant by "satisfy himself in another way".
"Rex, come!" Jeff commanded and the dog stopped his licking and followed his master out the door. Jeff returned a few minutes later without the dog. Deb was relieved but wondered what was next.
Deb felt a tube being inserted into her ass. Next she felt a warm liquid flowing into her bowels. The tube was removed and a plug was inserted to keep the liquid from dripping out. Deb's inhibitions dissolved and she groaned, wishing that the dog was back.
"Would you like to fuck the dog now, Sis?" her brother asked.
"Mmmm yes. Anything I'll fuck anything. Just bring it in and let it fuck me. Ohhh I'm soooo hot and horny, get the dog back. Let that beautiful big dog cock fuck me full," Deb moaned as she thought about the dog cock fucking her.
"Too late, Sis. I'm afraid Rex has found another mate, but if you'd like to watch I don't think Rex or his new bitch would mind. But you have to promise me you won't get jealous now," Jeff explained to her.
Jeff opened the curtain and turned on the lights to the other room. There in the middle of the room was her 16-year-old daughter Cathy, bound on the same kind of sloping platform Deb was, except Cathy's neck was not tied down and she was wearing a red ball gag.
Rex was busy licking Cathy's pussy from behind. Deb could hear her daughter moan through the gag, as Cathy moved and shook her head from side to side.
Deb couldn't believe it but, she was jealous of her daughter. Rex should be licking her cunt, not her daughter's. Her daughter should not be trying to steal Rex away. "I was Rex's first choice," Deb thought. "I'm Rex's bitch. Cathy you have no right to have Rex even touch you," Deb thought as her bodies desire continued to build.
Rex was driving Cathy wild with his licking. Sweet juice from her 16-year-old pussy poured out, as Rex's tongue greedily caught every drop. Cathy had surrendered completely to Rex's tongue lashing. Rex's tongue was so long and fast that, to Cathy, it seemed to be unrelenting. She wiggled her hips and pumped her pelvis in an effort to get Rex's tongue to different places on her pussy.
Suddenly Rex drove his long slick tongue up inside the 16-year-old, twisted the tip around and pulled it out. Cathy screamed through her ball gag with shear delight. She had never felt anything like that, but before she had a chance to calm down, Rex shoved his tongue inside her cunt hole and did it again.
From the other room Deb watched in anger as she watched her daughter taking Rex away from her. "Dam bitch daughter," she shouted. "I'm Rex's bitch, not you! Get away from him you little cunt!"
In her present state of mind, Deb regarded her daughter as the competition. As she watched the dog with her daughter she could feel every lick from the dog's tongue on her own pussy. She could feel his velvet tongue sliding against her cunt lips. Deb opened her mouth and tried to remember what Rex's doggie dick felt like when he was fucking her lips. She imagined giving herself fully to the dog, to do with as he wished.
Cathy's body shook with pleasure. She had never dreamed a dog could do this to a woman. The dog would snip at her clit, and his tongue would start it's seemingly unending slide along her entire cunt. With each lap the dog's tongue dragged her pussy lips with it. Then it would withdraw for a moment and leave her craving for it once again.
Deb's hips were humping air as she sought relief for her burning pussy. She was totally consumed with anger at her daughter and longing for the pleasure the beast could give her.
Cathy wondered how long before her fluffy lover would get tired and have to stop his tormenting of her pussy. "He just can't stop," she thought. "Can't ever stop. I would just die if he stopped now!"
Just then Jeff walked to the glass wall and pushed the microphone button. "Rex, fuck!"
The amplified voice startled Cathy and she looked in the direction the voice had come from. She was relived when she saw only a speaker. She relaxed again thinking she was alone with the dog and no one would see her perverted behavior with this animal. She was still free to enjoy the great new feelings she was experiencing.
To Cathy's frustration the dog stopped licking. Her body was starting to relax, when suddenly, Cathy felt the dog jump up on her back. "What is this dog doing now?" she thought twisting her head back to try and look at what was going on. The dog's body was jerking, and the dog's chest was moving on her back.
Cathy's head jerked back when something hit against her pussy. Then it hit again. And again. Cathy tried to move away, but Rex growled. Cathy laid still, suddenly afraid of what was happening.
Rex was relentless. He pumped with short strokes feeling for the correct spot, waiting for the opportunity to fuck his girl bitch. Within seconds he found his mark and jerked his haunches forward sinking his shaft into the entrance of the girl's extremely wet pussy.
Cathy screamed into her ball gag as the tip of Rex's cock invaded her recently virgin cunt. She tried to crawl forward but she was already as far forward as her bonds would allow. Cathy knew she could not escape and she lowered her head to await what she knew would come next.
Rex pulled back slightly and rammed forward again sinking another quarter inch into his new bitches cunt. Again and again he forced more and more of his cock into the girl. He drove with such force that Cathy could barely catch her breath. Suddenly his entire cock slammed into Cathy's stretched cunt. Rex paused for a moment and then started his unrelenting thrusting in and out of the moaning girl.
Cathy felt like she had a football jammed inside her. The combination of pain and pleasure overwhelmed her and she soon started pushing back at each thrust of the dog's cock. Cathy was amazed at the feelings she was experiencing. When Rex slammed into her, she felt pain, but when he pulled out she craved for it to be inside her again.