"What a gorgeous Collie dog," Kim murmured as she and her twin stood at the entrance to the dog pen, watching all the dogs excitedly cavorting in the mud. "What's his name?"
"Would you believe Laddie?" Dee asked with a grin.
"You're kidding! How original!" Kim said, laughing.
"Yeah, I know. But I agree that he's gorgeous. And look at that big Bulldog over there. He's got a hard-on that's making my mouth water," Dee said, her little pussy growing hot beneath her shorts.
"Me too! His name's Baxter. I read his nametag when we let him out," Kim said. "Come on, we're wasting time! Let's strip!"
Within seconds, the horny twin sisters were completely naked and they laughed with delight when they saw the dogs looking at them with real interest.
"You know, I feel kinda sorry for those three female dogs inside," Kim said, glancing back at the kennel building. "Can't we let them out here too?"
"No, Sis, if we do that, we'll have too much competition. These horny males might want to fuck them instead. And you know how strict Daddy always is about separating the two sexes. The owners don't want to find out later that their bitch dog is pregnant by some stud dog they don't even know," Dee said.
"Yeah, that's right. But I feel sorry for them. They'd probably like to be out here too," Kim said.
"Don't worry, Sis. After we have our fun with these big-cocked dogs, we'll clean them up and put them back in their cages. Then we'll let the bitches out for awhile so they'll have their turn too," Dee said.
"Okay!" Kim said, feeling better about the whole thing and the twins grinned at each other.
Dee stepped into the dog pen. As she stepped into the oozing mud, she groaned, feeling the muck go all the way up to her ankles. She joined the dogs, stroking them, playing with them, while Kim watched from the sidelines.
"Go on, Sis!" Kim urged, turning on more as she watched her sister with the dogs who were all sporting big hard-ons now. "Don't be afraid to get dirty!"
"You should talk," Dee laughed. "You're too chicken to even come out here!"
"I'll show you!" Kim said, laughing too as she wallowed out into the muddy dog pen and moved to her twin sister's side.
Dee cupped her own tits. Cooing with pleasure, she rubbed them, plumping them up.
"Do you like my tits, Sis?" she asked thickly.
"Sure, you know I do," Kim rasped hoarsely. "They're gorgeous."
"Mmmmm, my nipples are aching. They're so stiff," Dee said. She pressed the pads of her thumbs against the throbbing points of her nips, pressing and rubbing them.
Forming a circle around the two girls, the dogs barked excitedly, all of the horny stud animals watching the girls' every move.
"God, Sis, you're making my pussy so wet and hot!" Kim groaned.
"That's why the dogs are getting so turned on. They can smell our pussies. You know how that always gets to them," Dee said.
"Play with your pussy, Dee!" Kim cried. "Get it good and hot for the dogs! Make more fuck juice so the dogs can smell it!"
Dee stood there in the mud, pinching her stiff nipples, tugging at them. Her other hand drifted down her tummy and fell on her damp crotch. She stroked her juicy cuntlips. They rippled lewdly under her massaging fingers. She continued to tug and pinch her nipples with one hand while she fondled her cunt with the other.
"Wow! You're really horny! I can see a whole bunch of juice coming out of your pussy!" Kim cried excitedly as she watched her sister with lust-glazed eyes. "And the dogs can smell it too! Listen to them!"
Kim was right. The dogs all crowded closer to the twins, pressing their furry bodies against the girls and whining and whimpering with doggy lust.
Wetness oozed in Dee's pussy-slit, smearing on her stroking fingers. She began to rub her cunt up and down as fast and hard as she possibly could.
She spread her legs wider, pressed her middle finger to her sticky cuntlips, and slid it on inside her. The young girl threw her head back and moaned. She stood there in the mud and finger-fucked herself, her legs bent at the knees, her stiff-nippled tits jutting straight out.
Faster and harder she pumped her finger in and out of her cunthole while the horny dogs moved still closer, all of them sniffing at her aroused cunt.
"That's enough, Sis," Kim groaned, her own little pussy dripping with juice. She moaned as she felt a cold wet nose burrowing against her aching cunt.
"Just a little more," Dee panted, reluctant to stop fucking her finger in and out of her wet cunt.
"Stop, Sis! Save some for the dogs!" Kim said urgently.
"Yeah, I guess you're right," Dee giggled as she withdrew her juice-soaked finger from her pussy. "Who wants it?"
Dee held her finger out and felt three dog-tongues licking it hard.
"Wow, Sis, you're really acting like a bitch in heat," Kim said, shaking her head in awe.
"You think so? Then watch this!" Dee said teasingly as she suddenly dropped to her hands and knees in the mud.
"What the fuck are you doing?" Kim cried. Dee began to move around the dogs on her hands and knees. Her tits and ass jiggled temptingly and although the animals appeared to be a little confused by the girl's behavior, they were also very turned on. It was as if the girl had become one of them and their cocks grew fatter and harder as they watched her.
"God!" Kim cried, beginning to stoke her own pussy as she watched.
Dee padded up to her sister and brushed her naked flesh against Kim. Then she stuck out her tongue and licked the girl's free hand. With her other hand, Kim was still stroking her own pussy, running one finger in and out of her aching fuckhole. With her free hand, Kim pat ted the top of Dee's head.
"Good doggy," Kim said with a husky laugh. Suddenly, Kim took her hand from her pussy and used both hands to give her sister a powerful push downward. Dee fell into the mud and laughed. Dee gasped as she felt trickles of the slimy mud oozing into her cunt.
"Wow! I like that!" Dee panted.
Dee's white back, ass, and legs, stood out against the dark, engulfing mud. Dee shivered with perverse pleasure as she felt the thick mud coating her tits. The stuff rubbed against her stiff nipples and Dee moaned with excitement.
Dee struggled to her hands and knees again, mud oozing over the front of her body. She crawled around, laughing excitedly, the dogs an following her. She wallowed in the mud, the front part of her lovely young body now covered with a thick coating of the dripping mud.
"You horny bitch!" Kim cried, delighting in the lewd sight of her twin sister gleefully rolling about in the mud.
Laddie, the gorgeous Collie dog, moved to the front of the pack, whining as his sensitive nostrils caught the arousing scent of a bitch in heat.
The Collie pressed his body against Dee's. He pressed his snout against the teenager's mud-spattered tits, sniffing and licking. Then he circled her body, his nose prodding into her ass and cunt.
"Oh, yeah, Laddie, go for it!" Dee cried, wiggling her tits and ass to and fro.
The Collie barked as he mounted Dee. His muddy forepaws slid across her back. He humped his underside against Dee's ass.
"Yeah, fuck her good, Laddie!" Kim cried, leaning against the fence as she moved both hands to her cunt. She thrust the middle finger of one hand up into her puckering cunthole, fucking it in and out while she watched her sister and the come. With the thumb of her other hand, she rubbed her clit. She sank the middle finger of that same hand into her asshole, bucking back and forth between both hands.
"Yessss, Laddie, fuck meeee," Dee wailed, jerking her head up. She reached behind her body and guided the dog-cock into her cunt. She pressed the fat prick to her cuntlips and worked it inside her, using a screwing motion, jamming it deep inside her.
The fat dog-cock of the come was fully inside Dee's pussy now, filling her, stretching her pussywalls out.