Katy knelt on the floor and told her two packsisters to be quiet with a wave of her hand. Obediently, both of them fell silent within a heartbeat and stopped their sexual activities for the moment.
Two naked women and one german shepard bitch were now crouched down on the kitchen floor and waiting for what would happen next.
Katy listened, her head slightly tilted to a side, and tried to hear who was entering the house.
At first Katy could only hear the breathing of herself, her sister and her transformed mother. The sound of Sarah licking her fingers clean from her mother's pussy-juices was the second sound she heard.
The sweet smell of arousal of herself and her two packsisters was already slowly driving her into another upcoming wave of canine heat, but Katy knew that she had to resist her new urges for the moment.
As Katy's ears were able to tell her mind who had entered the house through the front door some moments ago, she smiled with sharpened teeth.
A short view into Sarah's eyes told her little sister to remove the collar from her mum's neck.
Slowly Katy rose to her feet and sneaked to the kitchen's only door, which lead to the living room. She closed it before the newcommer, his steps closing in now, would be able to peek into the room and spot the naked women and the dog bitch.
Devoit of the collar now, Karen slowly turned back into her human form before the eyes of her daughters. The fur crept back under the skin, the paws extended into nimble human fingers and the muzzle shrunk back into a human face that resembled that of the woman who had been Karen before the curse tainted her blood and erradicated her human self. Karen wasn't human anymore. Like her daughters she had been physically and mentally transformed by the collar. All that was of importance to her now was the spreading of the curse and the wellbeing of the pack.
"Packsisters" she whispered, her eyes gleaming feraly "I can smell the human Cal nearby. He has to..."
"... become one of us." Katy finished Karen's sentence.
"He will wear the collar and mate with us so our own transformation will be completed." Sarah whined in arousal. She was fingering her soaked pussy while she looked at the direction of the door that led to the house's living room.
- * -
Leaving his buddies Peter and Mark waiting in their car parked at the street next to the house, Cal entered his parent's house.
He hoped no one would be home, 'cause he only wanted to grab some cold beers from the kitchen's fridge and get back to his buddies. There was a party at the house of a girl named Justine this evening and he had high hopes that he'll be able to 'convince' her to ... well, he would be having fun tonight!
Smiling and whistling, Cal walked through the darkened living room and closed in on the kitchen, which's door was closed shut. Normally it was open all the time, but wasn't in the mood to think much about it.
"Aw, perhaps they did not want Buster to wander the house while they were gone," Cal said to himself.
For a moment he wondered where his two sisters would be, but as he heard repeated honks from Mark's car from the outside, he reminded himself of the cold beers waiting for him inside the fridge and the party to come afterwards.
One last step and Cal opened the kitchen's door.
While the living room was shrouded in the evening's darkness, the kitchen was illuminated and it took Cal's eyes a moment to get accustomed to the sudden change. He closed his eyes for a heartbeat.
When he opened his eyes again, his heart skipped a beat and a frightened gasp escaped his mouth.
Katy, Sarah and his mum were standing in front of him. They were naked and ... Cal's mind noticed it, but would not accept it to be true ... their pussies were soaked in arousal. Their eyes were gleaming, illuminated by the kitchen's light.
"What in..." he yelled, but he could never end his sentence as all three women jumped at him at the same time and knocked him to the living room's floor.
Cal suddenly was buried beneath three naked and growling women.
Katy held him pinned down on the ground with an strenght she shouln't have possessed.
Sarah clawed at his clothes and shredded them with fingernails that resembled canine claws.
Karen, bowed down on her son's face and started licking and kissing it.
Cal was about to scream for his buddies to help him, but suddenly his mum started kissing him directly onto his mouth and tried to get her tounge inside with force. She moaned in pure ecstasy.
Sarah had shed Cal's trousers and was now about licking his penis. She grabbed and stroked his balls with her clawed fingertips while her tounge trailed over Cal's exposed member.
This coulnd't be true! This had to be a nightmare!
Cal tried to get free from Katy's iron grip, but he was unable to move into any direction. His heart hammered fearfully within his chest.
Soon Cal's resistance waned.
His treacherous dick started to harden while Sarah continued licking it's full lenght and slowly scritched the balls with her claws.
Cal's mouth opened slightly so Karen's tounge was able to seek out his. Her saliva mixed with his own.
Cal closed his eyes, a tear gleaming in one of them.
Sarah's mouth engulfed his cock and started to suck it with abandon.
When he suddenly felt Katy's grip of his limbs easing somewhat, Cal saw his chance for a last try escape from the three crazy females.
Cal pulled his arms free from Katy's hands and tried to shake of Sarah from his groins as he felt a new sensation.
His mum had put something around his neck and fastened it there within a heartbeat. A dogs' collar.
"What have you..." Cal yelled at Karen, but suddenly he coulnd't continue his sentence as vivid pictures of mating dogs exploded within his mind. A powerful orgasmic wave flushed through his body.
Cal's eyes grew wide.
Where he had resisted the women's assault just moments before, Cal now moaned and shivered in arousal.
Katy and Karen were back over Cal just a second later. They started kissing, biting and sucking his body while Sarah continued sucking his cock.
Cal's moans turned into canine whines after only a few moments and has he had the short chance to have a look onto his cock, he realized that it had been altered. His human penis had changed shape to resemble a dog's cock in any way. A furred sheath had connected his long, slick canine member with his lower abdomen. Precum glistened on his pink shaft and Sarah licked at it with eyes gleaming of pure arousal.
"What have you done to me" Cal whispered moaning as the collar's curse erradicated the last bits of his human self, then he succumbed to his new instincts and started growling in lust.
"You'll be one of us, one of our pack. Your seed will complete our transformation as it will spread our curse." Katy whispered to her changing brother as she nipped at his ears "When your first transformation will be over, you'll lure your friends into the house so we'll be able to turn them over to our side, too. Then our pack will be powerful enough to spread the curse to the neighboring houses."
His face slowly pushing out to form a dog's muzzle, Cal growled in agreement. "Peter and Mark will join our pack. Soon they will feel the sweet arousal our curse brings. All will succumb, all will obey to the lust our curse brings."
Buried beneath his tender packsisters, Cal fully changed shape into a huge black-furred Labrador as the collar tainted the last few remaining human cells of his body.
Cal's human self was long gone as his canine cock spew forth it's cursed seed which Sarah drunk all to eagerly.