Just as the three conjoined family members were about to make their next move, they heard footsteps coming towards the kitchen. Knowing that it must be one of Mary's siblings, the dragon-taur grabs a handful of blue and pink candies and hides them behind her back, the three of them turning towards the kitchen door just as Mary's brother Mark enters.
“Hey whats going on, I could hear the commotion through my headpho- HOLY SHIT WHAT ARE YOU!?” He lets out a shout once he noticed the trio of conjoined dragonesses standing in the kitchen.
“What, don't you recognize your sister?” Mary purrs
“Or your mother?” Continues Melissa.
“Or your father?” Finishes Robert, as the husband and wife slowly creep the trio's shared body towards their son.
Mark was still stunned by the dragoness in front of them, and was even more stunned when they identified themselves as his sister and parents, so he was caught off guard when they suddenly pounced forwards. Before Mark could react Melissa and Robert wrapped their necks around his body, preventing him from moving as Mary placed her free hand on his shoulder.
“What turned you into this?” Mark asked, worried about what they were about to do to him.
“This morning a tub of candies were delivered to the house and after easting several of them, the three of us eventually fused into this form.” Mary answered, revealing the handful of candies hidden behind her back before continuing
“And now we want you to have some as well, so you can feel as good as we do.” Mary then opened her brothers mouth with one hand before shoving the candies into his mouth with the other, a few spilling out before she forcefully closed his mouth shut. Mark, realizing that if he didn't eat the candies they would force him to, began chewing them. Once he had swallowed, Melissa and Robert uncoiled their necks from around him and Mary slashed off his shirt and pants before the trio stepped back so they could get a good look at Mark's transformation. Upon being released Mark fell down onto all fours as the sensation of his changes wracked his body.
Starting with his hands and feet, light Violet scales began to spread across his body. As the scales covered his limbs, his arms lengthened until he was able to stand with both his palms and feet on the ground and his hands and feet became draconic claws and talons. As the scales moved onto his torso his shoulders and hips changed their orientations, making it so his body was now locked into a quadrupedal stance and his arms shifted into forelegs.
“Oh, this is interesting, is he turning into a feral dragon? Or is he going to grow a new torso and become a taur?” Melissa wondered as she and her body-mates looked on at the progressing transformation
The scales continued to spread across Mark's torso. When they covered his nipples they puffed up a bit, before rapidly growing into a massive pair of breasts that nearly touched the floor. At the same time the changes had also reached his crotch, the scales spread up his cock, already erect due to the candies, and it began to grow longer and thicker, barbs and ridges adorning its surface. As his cock grew, so did his balls becoming the size of basketballs as the scales covered them. When the scales covered his asshole it was transformed into a cloaca, officially making HER a hermaphrodite just like her parents and sister. Above her new cloaca her spine was quickly extending into a spade-tipped tail. When the scales had completely covered her back her a pair of majestic violet wings burst out of her back. Now that her body was completely changed, the scales raced up her head, transforming it into a draconic muzzle just like the ones her parent had.
Just as everyone thought Mark's transformation was over, her entire body began to grow until she was nearly seven feet tall at the shoulder, and she was twenty-five feet long from head to tail. The rest of her body grew proportionally to her new size, making her breasts the size of beach-balls, her balls the size of watermelons, and her cock was nearly ten feet long and as thick as a two litre.
For several moments the four dragonesses take in Mark's new form, as well as the kitchen that lay in ruins from her transformation. Eventually the silence was broken by Mark's booming, but feminine, voice.
“This form feels amazing, thank you for giving me those candies so that I could become this wonderful being.”
“Your welcome! After we had transformed we all felt amazing so-” Mary began before was cut off by Mark.
“HOWEVER, you still forced a pile of candies down my throat with no idea what might happen, so I think a little payback is in order.” The feral dragoness's voice started as a growl, but turned into a lustful purr as she grabbed the conjoined dragonesses around their feral torso and turned them around with her superior strength.
“I think I like what you have in mind” Robert said as Mark positioned herself over the trio, the head of her cock prodding at their shared female sex. Without another word Mark began slowly thrusting her penis into them, giving their hole time to stretch to accommodate her massive girth. Once her cock bottomed out inside them she began slowly thrusting in and out, her pace gradually quickening as she got into rhythm. As Mark built up her pace, Mary, Melissa and Robert found themselve enveloped in Mark's hyper tits all three of them cocooned within her cleavage as the two spouses licking and sucking on their conjoined daughters nipples as Mary moans in ecstasy. After many minutes and several orgasm's from the conjoined trio, Mark thrusts deep inside one last time, her massive balls slapping against their legs as her lust explodes. Mark's orgasm lasts nearly five minutes as she pumps several litres of cum into the shared womb of her parents and sister, causing their stomach to bloat to the point of touching the ground before the jizz begins to overflow and cover the floor. The four dragonesses collapse to the floor, their lovemaking having exhausted them completely.