[Contains Stuffing and Weight Gain]
Marceline was literally dragging her girlfriend out of her lab and towards the bedroom. Bonnibel wasn't fighting it one bit. As Princess of the Candy Kingdom, she could easily have done something about it, but she was just too tired. She was so tired, in fact, that her heels were dragging along the ground as Marceline pulled her along. It also helped that Marceline, as the Vampire Queen, had all the cool benefits of being a vampire, like being able to fly and being super strong, so moving Bonnibel was easy peasy, even if he did seem a touch heavier than usual.
Even as the couple got to the bedroom, Bonnibel was still mumbling some sciencey mumbo jumbo.
"Jeez, Bonnie, you've really been working too hard," Marceline said with a chuckle as she scooped Bonnibel up and plopped her onto the bed next to the mountain of snacks that Marceline had set up ahead of time.
"But that was important stuff," Bonnibel tried to explain, not sounding too convincing thanks to the blank stare forward on her face as she fumbled for the snacks.
"Yeah, but scrambling your brain from working too hard's not good for you. So, sleepover time. I even got your favourite movie." With that, Marceline pressed a button on the remote and the TV lit up and started playing the movie.
It wasn't long into the movie when Marceline realised how many snacks Bonnibel was going through. Once she noticed that, she quickly noticed what all those snacks had done to Bonnibel. She had grown a decent little belly, spilling over the waistband of her purple track pants and making prominent lovehandles. Her belly was even beginning to spill out of her pink hoodie. This wasn't like her at all, but it had Marceline curious.
"Hey, Peebs, where… uh… where'd this come from?" Marceline asked, gently patting Bonnibel's belly. "You okay?"
"Yeah, I'm good. I haven't seen the sun in a week, I barely left my lab for exercise, and I've been eating nothing but candy lately, but yeah, I'm good," Bonnibel rambled, only making short pauses to shovel handfuls of snacks into her mouth. Marceline narrowed her eyes and hummed in thought as she carefully poked Bonnibel's belly with her finger. The belly immediately responded by growing just a touch, barely enough to be noticeable, but it was very noticeable for Marceline, who almost couldn't think about anything else. She was fighting the urge to drink the pink out of her lovely girlfriend, when, against all odds, Marceline had a good idea.
"Well, why don't you try doing that burger challenge over at the Fast Food Kingdom? Marceline suggested. Bonnibel perked up for a moment, her eyebrow raised in confusion.
"Shouldn't I be trying to eat healthy food? Eating so many burgers sounds like a bad idea," Bonnibel thought out loud as she prodded her belly.
"Yeah… but if you eat that many burgers, you might not wanna eat any more of that unhealthy junk," Marceline suggested. Bonnibel thought about it for a moment, while Marceline quietly hoped that she wouldn't figure out her less-than-genius plan.
"Eh, it's worth a try," Bonnibel said with a shrug, before leaning over and resting her head on Marceline's shoulder.
The next day, Marceline, hiding under her massive hat, and Bonnibel were off to the Fast Food kingdom. A talking box of french fries was calling for competitors and Bonnibel stepped right up. She was confident that she could manage this. However, that confidence began to fade as she saw that these were no ordinary burgers. Each one was about the size of her head, and there were twenty of them, each one slathered with cheese and sauce, looking incredibly unhealthy. Bonnibel crossed her fingers and hoped that this would be enough for her to be sick of burgers.
She got off to a good start, getting through the first burger quickly, giving her a little more belly and a little more on her chest. Marceline was enjoying the view, and the view was only getting better and better as Bonnibel ate and ate. As each burger went down, Bonnibel kept on growing.
Her belly took on most of the growth at first, forming thick love handles that spilled over the waistband of her pants, joining her rounded flabby belly. It didn't take long for her navel to sneak out from under her hoodie. However, that wasn't all that grew on her. Most prominent after her belly were her thighs, expanding to fill out her pants and give her a very pear-shaped body. Her rear was large enough to match her thighs, and even began to push her up and inch or two in her seat. After that was, surprisingly, her arms, especially her upper arms, which were starting to get real chunky. If not for the obvious softness and flabbiness, one could almost be convinced that she was filling out her sleeves with decent biceps, just based on their size. After all of that was Bonnibel's breasts. Their modest growth, maybe only a cup size or so, was probably for the best, as her bra was already feeling a little too snug from her previous gains. At least, that was the case at first.
About three quarters of the way through the challenge, something changed, and suddenly, each burger was adding a cup size to her chest. Bonnibel couldn't do anything about it as her breasts spilled out of her increasingly small bra, for fear of doing something embarrassing. Despite her breasts surging out, the rest of her body did not slow down, continuing to grow thicker, softer, heavier by the mouthful.
When the final burger had gone down, and Bonnibel threw up her chunky arms in celebration, she was looking very different. Her ponderous belly filled her lap, spilling over the sides, much like her rear was doing to the poor seat she was straining with her increased weight. Her thighs had made her pants skin tight as they quietly creaked from the strain. Her breasts had rocketed all the way up to J cups and bulged around her incredibly uncomfortable bra.
As soon as Bonnibel collected her prize, she and Marceline quickly returned to the Candy Kingdom. Bonnibel did not look happy as her heavy self made the slower return trip, but Marceline hadn't noticed. Instead, she was busy admiring all the new and expanded curves on her girlfriend.
It took until the couple was back at the kingdom for Marceline to notice the grumpy look on Bonnibel's face.
"Hey, Peebs, you okay?" Marceline asked gently, floating around in front of Bonnibel to ask her to her face.
"I don't think this plan worked. All that happened was that I got fatter," Bonnibel complained.
"Well, how full are you?" Bonnibel thought for a moment, patting her belly carefully.
"I think I could fit a little bit more, somehow," Bonnibel commented.
"Maybe we should try maxing you out, see if that helps," Marceline suggested.
"Hrmm, it could be worth a try. Oh, but that could just make things worse. Maybe I should just lay off the junk stuff," Bonnibel commented.
"C'mon, trust me, this should work," Marceline insisted before heading off to the kitchen.
"Marcie, wait!" Bonnibel called out as she waddled after Marceline.
When Bonnibel made her way to the kitchen, much slower than she would usually have been and much slower than she would have liked, Marceline had already made her a sundae. The sundae looked very impressive, filling the large bowl and sitting high in a mountain of sweet vanilla, chocolate, and strawberry ice cream, with a thick swirl of whipped cream on top. The whole thing was drizzled with chocolate, caramel, and strawberry sauce, along with rainbow sprinkles and crushed nuts and, finally, a literal cherry on top. Looking at the majestic dessert, Bonnibel felt very, very conflicted. It looked delicious, and Marceline had done a great job, but all that food, and it being so unhealthy, gave Bonnibel a moment's pause. That pause disappeared the moment Marceline handed her a spoon. As soon as that spoon was in Bonnibel's hand, she dug right in, and the sundae tasted as incredible as it looked.
Unfortunately, Bonnibel was right about how unhealthy it was, as she put on even more weight right in front of Marceline's eyes. Fortunately, this being a much more reasonable amount of food than during the eating competition, the gains weren't as massive. They were somewhat dramatic though, as during Bonnibel's stuffing, her pants had reached their limits. Firstly, her belly had grown so large that it popped the button of her pants, letting her fat belly spill forth. Not long after that, the seams on the inside and outside of Bonnibel's thighs split, and they split loudly. Not even Bonnibel, who might as well have been in her own world, could ignore it. She blushed hard, putting some red on her pink face. It happened right as she finished the mighty sundae, so her suddenly stopping eating didn't have much of an effect. What did happen, however, is that Bonnibel suddenly felt very full, having not noticed that feeling until just now.
"Ooh, Glob, that might've been a bad idea," Bonnibel groaned as she cradled her blubbery belly.
"You okay Bonnie?" Marceline quickly asked as she reached out to put reassuring hands on Bonnibel's shoulder and belly.
"I don't think so. I'm gonna go to bed so I don't barf," Bonnibel groaned some more as she gingerly made her way back to her bedroom. Marceline followed alongside her, helping how she could and clearing the way ahead of Bonnibel. She was not in the mood to be stopped or stared at by her Banana Guard or any of the castle's other staff.
Fortunately, it didn't take long for the couple to retreat to Bonnibel's royal bedroom.
"Do you need help getting into your PJs?" Marceline eagerly asked.
"I… hope not, but stay here just in case. Just, y'know, don't watch like a creep," Bonnibel requested. Marceline nodded and turned around.
Even from her limited perspective, Marceline could tell Bonnibel was having some difficulty, with all the grunting and huffing and other noises of exertion. It was all too tempting for Marceline to just have a tiny peek.
What Marceline saw, she definitely liked. The first, most prominent thing she got an eyeful of, was Bonnibel's ballooned booty. So vast, so wide, so round, it took all of Marceline's willpower to not just rush over there and start squeezing. After that, her gaze drifted up to Bonnibel's back rolls which were, maybe unsurprisingly, rolling as she kept shifting her weight while she struggled her way into the concerningly tight pyjama pants. It also showed how big Bonnibel had gotten, that Marceline could see most of Bonnibel's bare back, as Bonnibel's belly and chest had made her shirt ride up quite far, and was stretched tight across her ample body.
Not wanting to get caught peeping, Marceline quickly turned away. It was just in time, fortunately, as Bonnibel had just managed to have her pyjama pants up over her behemoth behind.
"Marceline," Bonnibel said in a tone the told Marceline that she was in big trouble.
"Y-yeah, Bonnie?" Marceline winced as she said, bracing for impact. She turned around to face the music and saw what had happened. Bonnibel's belly, even with its width and roundness, hung down to her lap even though she was standing up. The double chin on Bonnibel's grumpy face also made things very clear.
"I can't fit in my pajamas now, and it's your fault," Bonnibel accused. Marceline hung her head in shame.
"I'm sorry," Marceline said in a pitiful voice. "I only wanted to help and I donked up big time." Bonnibel folded her arms under her bountiful chest and pursed her lips.
"Is that the only reason you made me get fat as heck?" Bonnibel asked in a way that said that she knew the answer. Marceline curled up in herself even more.
"No, I… liked how you looked when you were a little pudgy and… well… I wanted to see how you'd look if you were bigger. I'm sorry, I went too far," Marceline explained. The room went quiet for just long enough for Marceline to really soak in how badly she messed up when she heard Bonnibel take a long, deep, calming breath.
"Okay Marceline, I'm only a little bit mad. You can make it up to me by helping me diet and lose this weight, got it?" Bonnibel made clear. Marceline nodded slowly. "Good. Now, I'm going to sleep. You can sleep on the couch." Hearing that sting Marceline, but she agreed to it as she floated out of Bonnibel's room.
However, instead of finding a sofa to sleep on, Marceline instead made for the kitchen.
"I'm gonna make such a good breakfast for her when she wakes up, we'll be cool," she told herself as she got to work. "Gonna have to taste test a bunch to make sure I get this perfect."
In the morning, Marceline had a breakfast fit for a queen, or a princess, ready to serve. However, in the pursuit of the perfect breakfast, Marceline had put on a very noticeable amount of weight. Her jeans were skin tight and her fat gut hung out under the hem of her plain black t shirt and over the waist of her jeans, with the button creating a simple beneath her navel and with the waist itself supporting her new love handles. Just barely hiding under her shirt were silvery stretch marks, shiny and noticeable against Marceline's grey skin. Marceline tried sucking her gut in, but even then the pudge on her belly was noticeable. Knowing it was useless, Marceline let her gut out, making the button on her pants creak. She winced as she sunk her hand into her belly fat.
"Guess I'll be joining PB with the diet and exercise. Lame," Marceline complained in a fairly flat voice. "Hope Peebs appreciates this," she added as she scooped up the breakfast tray and made her way to Bonnibel's room.
Bonnibel could smell the food coming and woke up, letting the sheets spill around her and letting her belly pour out of her shirt and all over her lap, helped by her shirt rising as she raised her chunky arms, which were being pinched by her snug sleeves.
"Is that breakfast?" Bonnibel asked in a dreamy voice.
"Yep, royal breakfast. And… sorta… apology breakfast," Marceline explained as she came in and set the breakfast down on Bonnibel's pillowy lap.
"Marceline, what did I tell you about…" Bonnibel began, before catching sight of Marceline's fat gut. "That's quite the belly you have there," she pointed out, literally too, as she poked Marceline's belly.
"Hey, that tickles," Marceline said as she giggled. "I got this while I was making sure this breakfast was perfect."
"Well, it certainly looks good," Bonnibel reassured. It really was quite the breakfast. A stack of thick, fluffy pancakes slathered in maple syrup, a stack of bacon and eggs, and a nice little blueberry muffin, with a hot chocolate to go with it, with plenty of whipped cream, marshmallows and sprinkles. "Oh, I can't resist this. But, as soon as I finish this, we are going on that diet."
"Yeah, yeah, I'm not gonna complain. I don't wanna find out if my floating has a weight limit," Marceline joked.
And so, the couple enjoyed a nice, relaxing morning, knowing that they were going to be few and far between while they worked off all the weight they had picked up.
[AN: This fic was written for Mr- Animator here on . That's another new fandom written for, and I gotta say, I'm digging it. Probably gonna go back to my main thing, RWBY, for the next little while though.]