Renata Hamilton waved goodbye to Ruby and Jezebel before heading into her home. She was relieved to discover that her parents were working late. She had something important to tell Beck, and it was best if there was nobody else to overhear... especially with their Mom being Tori Vordenburg's aunt. The time had come to let Beck know about the skulk. There wasn't much risk of Beck panicking; after all, they were a werehyena themself.
Renata found Beck in their room, packing for their exchange student trip to Japan next morning. They looked up from their packing and smiled at their sister. "Hi, Renata!" they greeted, running a hand through their light brown fade cut dyed platinum at the tips. "How was school today?"
"Pretty good," Renata shrugged at her fraternal twin sibling. "I had more fun after it ended, though. How're things going with the trip to Japan?"
"Packing's a pain," Beck sighed, their muscles bulging and straining as they tried to force a stubborn suitcase closed, "but I'm pretty sure I'll be ready by the time I leave tomorrow morning."
"Here, let me help," Renata said, plopping her butt down on the suitcase. The full force of Renata's weight finally pushed the suitcase shut, and the redhead hastily fastened it.
Beck smiled gratefully at their sister. "Nice job, sis! Why didn't I think of that?"
"Probs because you're too excited about seeing Japan," Renata guessed. "Hey, can I talk to you about something, Beck? Something important?"
"Of course," said Beck, placing their strong hand on Renata's shoulder. "We're family. Ask me anything."
"Okay," Renata said, taking a deep breath. "Remember when you came out as non-binary three years ago? How you told Mom, Dad, and me that you weren't female or male, that your name wasn't Rebecca anymore, and you wanted to use they/them pronouns?"
"Like it was yesterday," Beck laughed. "Mom was so confused at first, but she came around. Wait... are you telling me that you're...?"
Renata shook her head. "No, I'm not non-binary. I'm 100% girl. But I do have a secret about my identity that's about as massive. Watch."
Renata willed her shift to start. Red and white fur began to grow like weeds all over the teenager's slim body as her feet stretched out into digitigrade paws. A bushy tail burst out of Renata's ass with such force that it actually pushed her pants down. As Renata's nails sharpened into claws, her breasts swelled in size as smaller secondary tits grew in beneath them. Her face pushed out into a muzzle as her teeth sharpened and her tongue turned long and flat like a fox's. To complete the look, her ears climbed to the top of her head and became long and pointy.
Renata posed dramatically. "Surprised, Beck?"
"Kind of," Beck said, inspecting their sister's new form with more than a little curiosity. "I knew werefoxes existed and that a few were in town, but I certainly didn't think you joined them."
"I guess I couldn't expect you to be too surprised," sighed Renata. "After all, Morgana told me that you're a werehyena yourself."
"You got that right, sis!" Beck grinned proudly. "Wanna see?"
Once Renata nodded, Beck began to strip. First, Beck slid out of their denim jacket before unbuttoning their ripped jeans and letting them fall to the ground. Beck then pulled off their belly-baring spaghetti-strap top and kicked off their converse shoes. Beck pulled down their boxers, revealing the packer they wore on their crotch in a harness at all times. Beck undid the straps and gingerly stepped out of their packer harness. Renata gasped; it wasn't everyday Beck was willing to appear before other people with their false penis off.
Beck was now fully nude aside from her belly button piercing. They willed their body to begin changing. Light brown fur with darker spots soon covered their freckled skin, and a brown mane tipped with platinum grew down their back. Beck sighed orgasmically as their spine elongated and their muscles expanded to amazonian proportions. Their heels raised up as their feet became paws, and mighty claws grew on their fingertips.
Renata gasped. She could see why Beck had to strip naked before transforming. They had to be around seven feet tall now, and they were a colossal slab of sinewy muscle. Good thing they were on Renata's side; a werebeast like that could easily snap a werefox in two!
A tail grew in just above Beck's asscrack. Their once smallish boobs ballooned into D-cups, and a pair of secondary B-cups bloomed beneath them. Beck's face stretched out into a hyena muzzle with a black, shiny nose to match. Their teeth sharpened and their ears turned big and round as they climbed into position.
Renata thought her sibling was done transforming, but then she remembered the special thing about werehyenas. This would be interesting...
Beck's clit, already large and prominent, began to elongate. It inched further and further down until it practically reached the werehyena's knees. Beck watched excitedly as their clit reshaped itself, becoming a proper penis. Their pussy slid backwards to make room for their ballbag, which swiftly grew into the empty space. Two plump testicles then dropped into the sack of loose skin. Beck smiled as shi felt hir balls. Now shi was a true herm!
Renata gawked, transfixed. She'd seen a werehyena transform already, but Taylor's hyena-person form was nowhere near as gloriously amazonian as Beck's. Beck also had a much bigger cock. Renata almost reached out to touch it before deciding that feeling up her sibling's dong would be a seriously inappropriate thing to do, even for a werefox. She settled for saying "W...wow! You... you're the biggest werehyena I've ever seen!"
Beck cackled uproariously. "Are you talking about my dong or my body in general?" Hir voice was now a smoky contralto.
"In general," Renata said, blushing under her fur. She realized that her werevixen instincts didn't particularly care that Beck was her sibling so long as shi was hot. Good thing the inhibitor potion gave Renata the power to veto impulses like this! She decided to distract herself by changing the subject. "So, do you still identify as non-binary now that you're a werehyena?"
"More than ever!" Beck grinned, waggling hir cock around for emphasis. "I go by they/them pronouns in my human form and shi/hir pronouns in my hyena-person form. You have no idea how liberating it feels to finally have a real dick, Renata! This has been my dream for years, and it's finally come true!" Beck's eyes roved approvingly over hir sister's vulpine form. "So, you're a werefox now. Welcome to the shapeshifter club! Uhh, you are on the inhibitor potion, right?"
"Totes," said Renata. "I'm actually starting up my own skulk, and I want it to be able to live in harmony with all the other groups of magicals here in Stokerville. I'm also hoping that we can be the first non-nomadic werefox skulk."
"That's great!" Beck grinned. "Maybe you could help with the breed's image problem."
"I'll definitely try," Renata promised. A thought suddenly came to her. "Hey, this exchange program wouldn't have anything to do with werebeasts, would it? It seemed to come kind of outta nowhere, right after Mom started noticing all those weird signs that something supernatural was going on with you. Is there a connection?"
"There is," said Beck. "It all started when Ellie Rubenstein joined our pack."
"Oh, the chubby girl," Renata nodded in recognition. "Although, to be fair, she's really slimmed down lately. She actually looks like a supermodel now."
"And she hates it," Beck said. "Becoming a werehyena heightened Ellie's metabolism, and all of her fat burned off of her in about a minute according to Alpha Selena."
"And she wasn't pleased?" Renata asked, perplexed. "I know I'd be freaking happy to get rid of a flabby belly like she used to have!"
"Not Ellie," said Beck. "She loved being fat and felt beautiful that way. She was horrified when her first shift turned her skinny, so Selena took her to the town witch, Morgana, to see if there was anything that could be done."
"I've met Morgana," Renata added. "She was the one who sold me the foxskin belt I used to transform. Did she have anything that could help Ellie?"
"Not in her shop," Beck answered, "but she did refer Ellie to someone who could help her out. It turns out that Morgana knows a Japanese kappa who teaches sumo and has the recipe for a magical chankonabe that can conquer even a werebeast's metabolism. His name's Kyūri-sensei, and his sumo heya's called Kyodainayokai-beya. Ellie agreed to enroll, so Morgana set up the exchange program to make it possible for her."
"That still doesn't explain why you're going to Japan tomorrow," Renata said, crossing her arms interrogatively.
Beck paused awkwardly. "I'm about to tell you something weird and personal, so try to be open-minded, okay? I've been exploring my sexuality lately, and I've realized that I have a... a fat fetish. I enjoy the sight of big women, and I wanna be big and soft myself. It isn't freaky or dirty; it's just who I am. You okay with that?"
"Of course I am, Beck," Renata smiled. "It's not a fetish I share, but all forms of sexual expression are beautiful. If yours includes a potbelly, that's great! You're my twin sibling, and I love you."
"Thanks for being so understanding, Renata," Beck said, hugging hir sister.
"Hey, it'd be hypocritical to kinkshame you when Jez and I are known as the school sluts!" Renata laughed blushing under her fur again when she felt Beck's flaccid cock pressing against her thigh.
"Ellie and I aren't the only ones going to Japan," Beck said as shi broke the hug. "As a matter of fact, a popular BBW camgirl's coming, jellyvixen698! Her real name's Kristi Wenzel, and she lost all of her famous fat rolls when she tried on a magical foxskin belt and accidentally turned herself into a werevixen like me. She traced the belt back to Morgana, who told her about Kyūri-sensei, Kyodainayokai-beya, and the magical chankonabe. Each of us are also allowed to bring a guest, so we're bringing along our girlfriends. I'm bringing Brianna, Ellie's bringing Harper, and Kristi's got a girl named Joelle. Brianna and Harper are both part of the pack, but Joelle's a human. She'll probably have to become a yokai to come along. I wonder what kind she'll be?"
"Who knows?" Renata shrugged. "I don't even know what all the options are. I mostly just know kitsune, oni, and kappas."
"Also, we werehyenas may have the dicks required to attend the school in our beast forms, but Kyūri requires that we be packing cocks at all times, including in our human forms." Hir eyes lit up with glee. "I can't wait to get changed so I never have to be without this glorious dong again!"
"Hey, I should warn you about something, Beck!" Renata cut in. "I think our cousin Tori might be a monster hunter."
"Tori Vordenburg?" Beck repeated. "Yeah, I've heard rumors about that."
"I'm just worried that Mom might've called her to investigate you after the mirror jizz incident. What if she finds a way to transform you back into a human?!"
"I'll be in Japan soon," Beck answered. "Hopefully, that'll give Tori the slip."
"But what if she finds out I'm a werevixen and turns me back into a human?!" Renata gasped.
"Just try to build up your skulk quickly," Beck responded. "There's safety in numbers, after all." Beck's ears twitched and shi glanced out hir bedroom window. "Shit, Mom's home!" Beck hastily shifted into their human form and began scrambling for their clothes. "Thanks for sharing, Renata. I'll be sure to tell you all about Japan and the yokai."
"See ya later!" Renata said, waving as she left for her own bedroom. "I hope you have a blast learning sumo!"