My Transfer Foster Sister Can't Be This Fat 10

(This story has elements of weight gain, fat admiration, pregnancy and expansion. And this is based off of the series OreImo, or Ore no Imouto).

Some time later...

Matt drove up to the house, hands full with 8 boxes of XL pizzas as he slowly walked up to the door. Today was the big day, in which he had talked to Kirino and Ruri on the side in private. Today was cosplay day, and he came up with the perfect topic for an upcoming video, which he bought an actual camera and tripod for.

He knocked on the door, would Kirino be in her outfit?

"C-Come in!" A strained voice said, no doubt Kirino's. As Matt opened the door, he was met with the sight of a MUCH larger Kirino, squeezed tightly into the cosplay they had decided on, a fanciful princess costume. With her continued gaining and her pregnancy ongoing, her belly had become absolutely massive. It could be seen very clearly in the dress, the cloth strained greatly by her grand stomach. Her rear was larger too, clearly sticking out despite the dress she wore having a classic wide skirt. Her breasts were hefty and grand, her chest making it hard for the brooch she wore to remain pinned on her boobs.

Her costume was very clearly and plainly too small for her, though Kirino herself didn't know if Matt secretly did this on purpose. The dress was a mix of pink and white, with the skirt mostly pink whilst the top of her dress was mostly white, with an equal balance between the colour schemes. The skirt was a traditional long frilly type reaching to the ground, whilst the top hugged her frame tightly with a imitation sapphire acting as a brooch. Kirino's hair had been carefully treated so to look longer and more elegant, all the while she wore extravagant earrings and wore a dainty jewel encrusted crown atop her head.

Matt licked his lips. "Hey my Princess. I see you're all dressed nice. Are the windows are blacked out?" He asked entering the house, seeing the windows covered in black sheets from the inside. Good, all for their little role-play film.

"Also, we are doing a weigh in before and after. Filmed of course." He entered, giving Kirino's ass a squeeze. "IS the funnels, shakes, and barrels all set? And the twinkles?" He looked around, trying to find the food. "Also, my costume is in my room. I'm getting hyped~"

He wondered if Ruri is getting her costume ready. She has ballooned up too! Hopefully Kirino doesn't know...

"Oh yes, everything is all set." Kirino replied, already loving the heavenly smell of the pizzas. "Ruri helped me out before we got in our cosplays ready. Come to think of it, I haven't seen her at all since then. I think she went to her room to get sorted, but maybe you should check in on her!"

"Maybe she's busy with homework," Matt commented. "Anyways, camera is all set. Lets turn on the AC. It's getting hot in here!" He said as he set the pizzas down by the coffee table out of side by the main chair, which is the setting of their film. "You sit down and relax. Also, hows the little one been holding? They like their mommy in a dress?" He asked with a smirk as he set the pizzas down. "No eating. Yet." He said as he climbed upstairs to his bedroom to change. "Turn o the AC will ya?"

"Oh yes, they're not a bother~" She stroked her belly lovingly, feeling a tiny kick in return. "They're smart enough to not bother their mommy with any naughty cravings or overzealous kicks when she's trying to get ready!" Still rubbing, she waddled over to turn the AC on, surprised she didn't think to do it earlier given how humid the air was and how tight the dress had been on her, making her entire body radiate heat. "AC is on Matt!" She yelled to him as he went up the stairs. There was Kirino, left alone by herself with only several boxes of pizzas to keep her company. Several great smelling boxes which were likely the spicy meat option, her personal favourite. The aroma of spices were clear to smell. She licked her lips as her eyes locked on.

"That's good" Matt called out as he climbed the stairs and entered his room, and he found his costume and began to change. Before long, he came out wearing a spiked helmet akin to a Viking, a loincloth around his waist and exposing his soft and small belly, and he was bare foot.

"Okay, all set." He said loudly, knowing that Kirino and Ruri got the cue. Ruri will come...eventually when they get into the film, to surprise his first love.

"Let's tie you up then Kiririn, or should I say Princess Kiri~" he smirked as he walked down te stairs, ogling his lover.

"Of course!" Moving herself away from the pizzas and wiping the slight drool from her mouth, Kirino quickly plopped her massive rear onto the nearby chair, causing it to creak greatly. Smiling as Matt entered the room once more, she primmed her hands ready for tieing. "Isn't this a lovely little costume you got yourself, hmm~" She added, eyeing up Matt with all manner of thoughts rolling through her mind.

"Yep." He smirked as he walked up to her, and he found he duct tape and began to apply it to her wrists and legs to the chair. "It's light, but pretend to struggle okay love?" He said as he stood up. "It's for the...dominance." He winked. "So , know your role? I'm the barbarian who captured you and is going to make you, who is already engaged, my fat breeding bride for my demon army. Sound good ~?" Matt smirked as he walked over to turn off most of the lights, and lighting candle lights and preparing the candle.

Practicing her struggles by giving the taped arms some slight movements. "Don't worry, I've been paying attention, i've seen the little script you jotted up~" She moved about on the chair to make sure her movement was limited enough so it would look believable. "Some rather interesting choices of dialogue for me, wouldn't you say?" That's when she laughed and gave a wink. "It's like you know exactly what I'd say in this scenario!" With the light dimmed and her blubbery self nicely tied up on the chair, Kirino felt she was ready. "So, have we got the all clear to go?"

"Yeah, ready in three...two..." He pressed record, and the camera started rolling.

"Well well," he oiled. "What have we here~, I see my servants have succeeded, and now... You are in the grasp of King Carran, Princess Kiri~" he said, approaching her and prowling around her. "You're husband the prince will never come for you..."

Trying to shake about the chair, Kirino scowled. "He'll come for me! Just you wait you fiend! He'll slay you and save me from your vile clutches!" She continued to try her escape, but stopped eventually as she began to pant, getting tired out from the effort. "You wouldn't dare lay a finger on me anyway! The kingdom would wage total war if anything happened to me!"

"Yeah, about that? Your kingdom IS at war, with MY army..." He smirked as he grabbed some belly fat. "I see you're already nice and round...but you're only going to get bigger, my bride." He stepped back and retrieved the pizza boxes.

"This, is a Varangian speciality, and once you eat it, you'll be addicted to it! And you'll be forced to eat all of this!" Matt lived his lips as he took a slice.

He then groped her belly hard, and brought the slice to her lips. "Be allured by the aroma of the Azzip Pie...and eat. You pig princess."

Kirino struggled as she moved her head away from the piping hot slice. She licked her lips reluctantly, trying to stop herself from giving in only to have the slice moved closer and closer to her mouth, right until it was barely brushing her lips. The smell was too much for her, it was almost heavenly! Unable to resist anymore, she opened her mouth slightly and found the slice shoved into her mouth by him! Relishing the wonderful taste, she gulped it down and the slice was instantly replaced by another, this time eating it a little more hungrily. And another. And another.

Matt grinned as he entered slice after slice down her mouth, before long, one box out of 12 was in her belly.

"Impressive princess, I never knew you to be such a greedy little glutton." He groped her breasts and felt them.

"Want more? You know you do..." He smirked evilly as he got down his knees and massaged her gut through her dress. "Oh? Was that a kick I felt? Don't tell me you have that foolish prince's child inside you."

Not stopping from eating, the hungry princess merely nodded her head with a mouthful of the greasy treat, Matt's hands caressing the surface of her grand belly, feeling the soft kicks of the unborn inside of her. This only made Matt's devious grin grow even wider. All the while, Kirino couldn't care less. She was weak willed and the lavish offerings of the wonderful food were more than enough to sway her feeble mind into a slew of gluttony, she only wanted to eat more and more of the food.

He grinned evilly. "Well, answer me. Answer your future king." He patted her full cheeks and stepped back, arms crossed and showing the bulge in his loincloth.

"If you answer, you can have more."

Frowning a little at the prospect of having to stop eating, Kirino rolled her eyes. "Yesh" She answered with a mouthful of pizza, still chewing away as she ate before swallowing her helping. "Yes, obviously I'm pregnant with his child. Who else would be the father of my unborn? I would never dream of being unfaithful to my dearly beloved!"

Matt grinned. "Well...that child will be mine soon enough." He brought the next box of pizza and brought a slice up. "Eat. The more you eat, the more that unborn child of yours will be mine." He smirked as he brought the slice to her mouth.

And another. And another.

Before the box was all down her gullet. Soon...maybe two more boxes, that dress will rip.

The feeding continued, the princess completely playing into the plans of the devious leader. Her mind was awash with the glorious food before her, her hungry maw gobbling up every slice presented to her, her lips coated with grease and her stomach filling more and more as she ate. She felt the pressure of her dress crushing against her bloated stomach, but she couldn't care. After all, there was still so much to eat...

Box number 2, he continued to feed her more and more.

He even stole some gropes and feeling of her fat body. Her belly, her breasts, her thighs.

"I can feel you getting heavier. Soon you'll be so fat you won't be carried by the strength of man." He licked his lips. "And your young deep down inside you is changing...into my prince of darkness..."

She listened, but it didn't register. She would've likely stopped eating and called for help if she had the will, but she didn't. So many boxes still to devour the contents of, why waste time NOT eating? She held back a few belches as she continued to have her face stuffed, not struggling or resisting in the slightest. Her chair began to creak and the faint noise of slight tearing cloth could be heard as she ate, her whole dress becoming tighter and tighter to the point of discomfort. What she'd give for it to break apart....

Matt patted her belly harder. He turned up and went from box 3.

He returned and brought something else. Butter with a knife, and Parmesan cheese. He began to butter up the crust and dabble the pizza with cheese. He even took off the cap to smother the pizza.

"There. With stronger agents, your young inside you will change and you will get bigger my princess. Your dress shows signs of it~" he grinned as he brought a fatty greasy slice to her lips.

Chewing slowly onto the smothered slice, Kirino was taken aback by just how delicious it all was. The pizza mixed together, giving her more taste to enjoy and more to eat. She gulped it down and quickly scarfed another buttery and cheesy slice, surprised at how much it was filling her belly up. The first tears were present on her dress, a couple of rips on the dress near her hips as her belly expanded outwards, the outline of her navel clear to see at the front. "You'll...n-never...mmmm..." Kirino mumbled in a feeble attempt to resist

"Never what? Say it." Matt smirked as he continued to feed every slice into her, buttering up and cheesing ever slice. Soon, box 3 was gone.

"Now...feel how heavy and fat you are princess~" he grinned as he groped her tight taut mountain. He leaned in and began to kiss and lick her belly button. "Yes...your young is acting up a storm...the change is happening Princess Kiri..." He stood up and returned with several pillows, placing them under her chair when and if it breaks. He's betting on When.

And after box 4, SHE will come with the extra flavor. He can't wait to see Kirino's face.

"You'll never...win...m-monster" She muttered, her breathing lethargic. She didn't want to talk, she wanted to eat. Kirino was starting to wonder if this was really all an act or if she was really going through such a ritual. Sure, she enjoyed eating but right now she felt ravenous. Her dress was already breaking apart and her stomach was stuffed to the brim (She'd opted to snack greatly before filming), Kirino still wanted to eat. The Pizza was far too delicious to give up, she had to have more...

She shivered as an odd feeling spread across her body, feeling her navel being caressed with Matt's tongue. He was right too, her child was going mad in there. She could feel every individual kick, some of them even clear to see through the dress. The influx of food must've really sent it crazy, after all it was getting a hefty helping just as she was. All the while, she could hear the ominous creaking of the chair she was sitting on.

Matt grinned. "Well then... We will need to see about that..." He smiled as he opened up Pizza 4... And he did the same thing as box 3, only this time to had the slices placed on top of each other, like a sandwich.

"Eat it..." He commanded as he brought it to her mouth, his groin that can barely contain the bulge in his loincloth brushing against her giant belly as he gyrated against her, and fed her.

"Soon... You will birth the prince of darkness...and he won't be human anymore." Matt smirked as he grinded his groin against his love's kicking and gurgling food baby

She ate. She ate and ate and ate. Another bite, another rip in the dress. Another swallow, another creak on her chair. Kirino was a prisoner to food as she loved it. She always anticipated the next slice of pizza, excited whenever Matt would change things up, whether it was adding another topping or sandwiching slices together. She loved it when he did that and loved eating them even more. Her lips were filthy with grease and crumbs, a couple of dollops of cheese and meat dropping into her massive cleavage, her dress starting to lose control of her breasts too. The belly section of her dress was now a complete array of tiny tears and rips, looking like it'd fall apart any moment then.

The final slice of pizza from the current box was here. Her opened her mouth lazily as Matt brought it to her mouth before merely tipping it into her wide maw, to which she chewed it slowly and carefully. She enjoyed the taste, but the sound soon stopped that. She could hear creaking, much louder than before. It was too late for her to act, the chair legs snapping without warning as Kirino's heavy body landed squarely onto the pillows below her, her dress finally giving way, allowing her belly to ooze freely from its confines. Kirino gave a loud thunderous belch as she landed, completely dazed.

Matt looked down, seeing the dazed Kirino and licked his lips. "Oh? We are only half way there Kiri. Don't assume we are nowhere near done. Now, your belly is exposed." He got into his knees and got out ketchup packets, opened them , and began to make tattoos of ketchup on her middle.

" now the ritual. The first one. Using your little one's life force, I will summon my great general of darkness." He stood up, looming over the dizzy Kirino.

"Come oh lady of darkness and lust! Come to my side! Awaken from the dark depths, the Succubi Queen! Felida!" Matt bellowed. Deep down he felt a bit nervous.

It was time. Time for Ruri to give her big sister her love.

Matt looked down, grinning at the girl as he stood by the remaining four pizza boxes. Along with that, he looked up, the door to leading to Ruri's room opening, the light a dark tinted blue.