A toothy grin spread across Karen's muzzle when she saw her daughter come. "That's right, dear. Just let go and feel the bliss of release, over and over again."
Samantha sat up quivering and panting in the grass. Her mind was tearing apart. "Mom, we're...we're sick, mom. Something is turning us into fuck-hungry animal things, and you're not yourselves anymore! I see that look in your eyes, you dont even care that I just said 'fuck,' do you? It's just turning you on again!"
"Sam. Sam, honey." Karen pulled away from Jennifer and walked toward her daughter. "You'll understand soon. My eyes are open!" Her dick bobbed in front of her like a dowsing rod and she casually reached down to grab it. "Embrace desire! Find the shameful fantasies you've buried down and give yourself permission! Haven't you ever wondered what it's like to have one of these?" She gave her dick a squeeze and stroked it languidly just half a foot from Samantha's face. "Now you have one. You know how good it can feel."
Samantha moaned at the sight and smell of her mother's bestial member so close. Her own dick stirred to life again, tenting her pants insistently.
"That's it, Sam. This is a good thing--it's a gift to be enjoyed. And shared. We can help other people feel good like us, good in ways they never imagined they can feel." Karen looked at the hard shaft in Samantha's pants. "Oh, sweetie, you should take those off, you'll feel so much better.
Sam swallowed hard and fumbled at her pants. As far gone as her mother was, she was probably right about this. Her pants were really tight against her now, squeezing her balls and rubbing her dick against her leg with a near constant stimulation. She grunted as she got the fly open and pulled her new endowment free. Her panties hugged her ballsack and her dick stood a solid six inches. It was slick from the loads she'd blown already, and it sprung up and practically slapped her belly when she freed it from its confines. She stared at it in fear and arousal, trying at the same time to both will it away and stop herself from wrapping her hand around it. "Fuck, mom, it does feel good. This is really happening. This is something that's happening, I have a dick and it's…"
"Ohhhh-HEE! HAWWW!"
She looked over to see her uncle grasping his chest. Fur was now growing all the way over his torso. He squeezed and kneaded with a moan that blended into a bray as his chest began filling his hands more and more, growing and swelling, blossoming into a pair of breasts. Before long they threatened to overflow his hands. He squeezed them together and marveled at his cleavage, glancing up momentarily to see Jennifer eyeing him hungrily. "Look at me, Jen. Look at these boobs!" He let them drop and they bounced and jiggled. They were the size of grapefruits, hanging with a slight sag from their size. Thick black nipples stood out noticeably from his fur. "Do you think they're sexy, honey?" He fondled them, enjoying their size and sensitivity as well as the look on his wife's face as her cock sprang back up to attention. He gasped and leaned back against the table for support as his hips suddenly widened. His diminished dick stood out from his groin like a wine cork. Past his shrunken scrotum Jen could see his black labia, puffy and glistening. He ran his hands over his new curves. "Jen, look at me...I'm...HAWWW! so hot and horny. Don't you just want to fuck me?" He turned and leaned over the table, pointing his ass at Jennifer. It raised slightly as his feet began deforming, elongating, pushing it higher. He looked over his shoulder at her and flicked his tail to the side. His asshole was puckered and his dark meaty vulva peeked out from under the crack of his bubbly ass, seeping lubricant and winking open and shut at her. "Look at how much I need you."
Jennifer didn't need a second invitation. Her toes began merging together and lengthening as she stumbled forward, almost as if her cock was pulling her toward Jack. She plunged herself into his eager pussy with a lusty bray. She thrust in and out, her balls slapping him as her toenails fused into thickening masses. The fur spread entirely over their bodies and a short bristly mane grew down from the back of their necks, ending between their shoulder blades.
Karen knelt by her daughter to watch Jennifer plow Jack with her donkey cock. She shivered and groaned and her toenails began growing long and sharpening into claws as she pumped herself. "Mmm, look at your aunt and uncle, Sam. That looks so good, I wish your father was still here." She closed her eyes and took a long, deep sniff of the scent wafting over from the rutting couple. Her twitching nose pressed forward as her muzzle grew more pronounced, her ears growing larger and cupping as they shifted higher on her head. "I'd love to just bend him over and bury this thing in him. I should have done that when he first came back out of the house." Her pumping grew more intense. "He wanted me in him, Sam, I know he did! I should have done better."
Samantha now had her hand back around her own dick. She was watching Jennifer and Jack just as her mother was. She couldn't pull her eyes away. The sight of the immense length of her aunt's dick sliding in and out of her uncle's pussy was mesmerizing. In and out. Balls slapping. Jack's now jiggly ass rippling as Jennifer drove her dick home over and over. She began sliding her hand up and down her cock and a string of drool dripped from her tongue as it lolled from her mouth. The sound of the sirens was much closer now, but she didn't seem to notice at all. She licked her darkening lips and began panting.
Karen had now gone to all fours, jerking herself off madly and thrusting as fur now began sprouting up in patches all over her body. "I should have fucked him! Should have pulled our pants off and emptied my balls into him. Pump his snatch full of hot--ohhhhhhh!" She cried out as another load of jizz erupted from her dick, pooling in the grass beneath her after narrowly missing painting the underside of her breasts.
Samantha, meanwhile, grunted and stroked as her dick surged in length by another two inches, the flesh turning red and the tip tapering. Her pubic hair began falling out as finer white hairs grew in their place. They framed her pussy and spread over her balls, creeping up her skin as her new foreskin thickened and migrated down her shaft to form a sheath around the base of her cock. Precum streamed freely, lubricating her member once more. She began panting harder as her mom ranted next to her, her tongue growing a bit longer with each breath.
"Hahhh, hahhh, hahhh, you were right, mom--it feels so good having a dick! Maybe I should call my boyfriend to come over. I've given him a few blowjobs, I think it's time for him to return the favor!"
Her ears grew slightly longer, the curve at the back of each growing into a point. Here and there on her limbs and neck a blotchy patch of skin turned black, heralding a spotted coat of fur that would grow sooner or later. She was in heaven riding the edge of orgasm, but the sounds of her mother's cries of ecstasy and of her orgasm spattering the ground were too much. A growl rumbled from her throat, resolving into a throaty moan as she tipped over the edge. Her head tilted back and her eyes nearly crossed as her abdomen clenched. She began thrusting her groin, stabbing her cock into the air as cum erupted from it like a volcano. Heavy spatters of spunk landed on her thighs, chest, and belly, soaking her clothes. Over about nine or ten seconds, her ejaculation slowed from a geyser to a trickle as her balls emptied themselves. She milked a few final drops from her canine cock and slumped with a satisfied sigh, gently stroking the fur of her balls as her red rocket began retreating into her new sheath.
After a few seconds of panting recovery from the head-spinning orgasm she looked up to see four paramedics standing at the edge of the yard, three men and a woman. They were staring agape at the scene before them. If Jack and Jennifer noticed their presence, they didn't show it. Jack was quivering, his pussy spasming and clamping down around Jennifer's cock. His mouth hung open mutely as his voice caught in his throat from the force of the orgasm racking him. Jennifer bit his neck and buried herself deep in Jack's pussy with a long purposeful thrust, holding herself inside him as she blew her load. Jack found his voice again and brayed wildly as his wife filled him with her seed. Jennifer released his neck and her voice joined his in a bestial chorus.
One of the paramedics dropped his kit bag in shock. "What in the fuck do we do with this?"