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Published:
2025-06-28
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1/1
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Growing Secret

Summary:

Sebastian has several secrets and one of them keeps getting bigger and bigger behind closed doors and late at night.

Weight gain fic

Work Text:

Finally!

Sebastian had escaped the dining room table and had returned to his basement bedroom.

His mother always insisted that the whole family must eat dinner together. Sebastian didn’t understand why he had to be there because it’s not like he ever said much, he just ate and sat there and left as soon as he could.

Sebastian went straight to his cabinet and opened the bottom drawer. This drawer was his prized secret stash of goodies - about every kind of snack food that’s could be imagined, crisps, cookies, little cupcakes, chocolate bars and more as well several cans of cola. He kept this drawer well stocked from Joja Mart and kept it secret from everyone, even Sam didn’t know about it.

He grabbed a pack of cookies and sat down at his desk and got back to work on his computer. He ripped open the packet and started eating.

Sebastian was full from dinner but he didn’t care he wanted something sweet.

Within two hours all 20 cookies in the pack had been eaten.

Sebastian got up and stretched, his hoodie lifted exposing his chubby belly, he looked down, gave the pudge a little squeeze and a smug smile before adjusting his hoodie and tossing the empty cookie packet under his desk.

No one knew Sebastian was getting fat. It was another secret he kept to himself, most of the time he was in his room where no one else would see and when he wasn’t he always wore baggy hoodies and it’s easy to hide a growing belly under a big hoodie.

It was partly a game to see how big he could get and partly a test to see how long it would take for someone to actually notice he was putting on weight.

He grabbed a big bag of crisps made for sharing, sat back down and started eating his way through them.

A few hours and snacks later Sebastian looked at his clock 2:00 AM. Everyone else in the house would be asleep.

It was time for his favourite secret.

He quietly opened his door and snuck up the stairs and headed to the kitchen. He opened the fridge and opened the drawer assigned to him and grabbed 3 boxes of sashimi, some soy sauce, a big jug of pumpkin soup and one and half pre-cooked pizza.

He laid them all out on the table and returned to the fridge and grabbed 2 bottles of milk and 2 large pumpkin pies and put them on the table too.

He sat himself down and looked over his feast.

He picked up the first slice of sashimi, dipped in the soy sauce and put the whole thing in his mouth.

He loved sashimi so much he almost an addiction to the stuff.

He ate the first tub quickly and immediately opened the second one and finished it just as quickly.

He knew the sashimi wouldn’t add much to his stomach but he couldn’t leave it out of his stuffing.

The third tub went down just as quickly as the other one.

Next was the soup. He didn’t bother to warm it up he just tipped the jug up directly into his mouth and swallowed it down as it slowly flowed out of the jug.

He could feel the soup pooling in his stomach filling all the gaps.

Sebastian felt full now but he wasn’t done.

He was on to the pizza now. He started on the half. He grabbed the first slice and took a bite then another and another.

His belly was straining at his jeans waistband. He loved that feeling.

He picked up the next slice and took the biggest bite he could. He finished the slice in only four bites and a lot of chewing.

His stomach gurgled loudly so he started to rub it with one hand in an attempt to calm it down while he shoved another slice of pizza in his mouth with the other.

His stuffed belly was starting to show through his hoodie as it rounded out.

Sebastian ate another slice and then the last of the half pizza.

Without missing a beat he shoved the box out the way and pulled forward the full pizza.

He grabbed the first two slices and ate them together.

His expanding belly was starting to hurt from within as well as from his jeans deeply cutting into it but he kept pushing on.

He grabbed the next slice of pizza and stuffed it into his mouth, chewing it slowly.

He was getting out of breath from all the eating.

He finished another slice and another. One hand rubbing his expanding belly and the other constantly grabbing more food.

He grabbed two more slices and ate them together leaving only one left.

He quietly moaned from the feeling of being so full.

He picked up the last pizza slice and slowly bit into it. His stomach gurgled and he swallowed down yet more food.

As much as he loved the feeling of pressure the pain of his jeans constricting his belly was too much now.

Sebastian sucked in his stuffed stomach much as he could and after fumbling under the overhang of his belly he unbuttoned his jeans. As soon as he had his overfull stomach rushed forward, spilling out the bottom of his hoodie and filling all the room between him and the table.

He massaged the deep red marks around his large belly. He could feel just how full he was and it felt so good.

He felt thirsty after so much food so he grabbed a bottle of milk. He popped off the top and lifted the bottle to his lips. He tipped up the bottle and began to chug, he could feel the milk flowing down into his stomach expanding it even more.

He drank the whole thing in one go. He put down the empty bottle, wiped a drip of milk from his face and stifled a burp.

Sebastian paused for a minute mentally preparing himself for more. He was really pushing it tonight normally he would give up now but not tonight, tonight he was determined to eat everything.

He lent forward with difficulty and pull forward the first pumpkin pie. These were supposed to feed at least 6 people probably 8 but he was going to 2 of them all to himself.

He had pre-cut the pies into big slices so he picked up the first one and took a big bite.

It was nice but it was dense and heavy and filling but Sebastian was committed now and he wasn’t going to give up.

He fished the first slice and picked up another. He stuffed it into his mouth, chewed and swallowed it down. He finished the slice in three bites and picked up another, he took bite after bite, stuffing his face, filling his whole mouth and puffing out his cheeks before forcing himself to swallow and then immediately stuffing his face again.

He was speeding up grabbing slice after slice. He was getting the filling all around his mouth but he didn’t care. He just kept eating and didn’t stop.

He could feel his belly growing, pushing out further and further, it was touching the table and then painfully pushing into it. He was going to be big, he was going to be heavy and so very, very fat.

When he finished the pie he shoved the box out the way and grabbed the other milk bottle. He lent back and chugged it down the same as the first, feeling his stomach rounding out.

He wiped his mouth with his hand getting a mix of milk and pumpkin filling on it.

When he lent back forward his belly gurgling loudly. Sebastian wrapped his arms around it to attempt to dull the noise but squeezing his stuffed stomach made him breathily moan.

He held still for a couple of minutes to make sure no one had been woken up, embarrassment flushed on his face and no one appeared.

He let go of his belly and after struggling to reach the pie around the large mass of his stomach that he was squishing into the table he grabbed it, pulled it forward and picked up the first slice.

He took a big bite, filling his whole mouth and swallowed it down and did it again repeatedly for next the couple of slices.

He was going much slower now than before. He was worn out from eating so much, so quickly.

His fully stuffed stomach churned and gurgled as more food was forced down into it, expanding it further than it had ever been stuffed before.

His whole, rounded out, bulging belly was on show now, his hoodie useless at covering its bloated size and Sebastian still continued to make it larger.

He picked up the next slice and took a smaller bite. He was massaging his belly again trying to get it to calm down and hurt less. He was so full, so very, very full but he was nearly done not much more now.

Every now and then he was push his hand into his stuffed stomach to feel a bolt of pain and pleasure.

Only two more slices now.

He picked one up and stared at it before forcing himself to put it into his mouth and eat it all in only three bites.

He grabbed the last slice, his belly aching from fullness and he finished it.

He lent back and marvelled at what he had achieved. The table was a mess of empty food containers, his face was covered in smears of pie filling and his stomach was huge.

He didn’t want to move and he wasn’t sure that he could.

He put a hand on each side of his stuffed belly and felt how hard it was under the layer of soft fat he already had from all he had consumed.

He knew his stomach would go down once it had digested but how much bigger would it be now? How much more fat would he have to grab and play with? How tight would his jeans be when he could button them? Could he still button them or would his belly be too big now? Only time would tell but the thoughts turned him on.

He gather all the strength he could, pushed back his chair and heaved himself up. The movement almost made him sick but he kept it in. He could feel his fully stuffed, heavy stomach weighing him down.

He immediately had to lean against the wall.

“Fuck” he said quietly to himself “ohhh fuck”

Sebastian rubbed around the bloated circumference of his stomach.

His jeans were stuck to his chunky thighs under the overhang of his belly. He attempted to adjust his hoodie to cover his stomach now he was standing but it only cover half squeezing it while the rest hung out the bottom.

He quietly put all the empty tubs in a bin bag to throw out in the morning as quickly as he could without losing his balance.

He could feel all the food and milk sloshing around in his large, far over stuffed, belly as he moved.

Next he had to sneak back downstairs. The steps were creakier now from his new extra weight.

He was out of breath when he got into his bedroom and flopped down on his sofa.

The sudden movement wobbled his large stomach and it took a couple of seconds to settle.

Sebastian pulled off his not big enough hoodie and with difficulty took off his too tight jeans.

He sat and relaxed letting his full belly hang out in the open sitting on top his chunky thighs.

The ache from the stuffing had began to calm down and his stomach was growing soft again.

Again he didn’t want to move so he started playing with and squishing his big belly in between his hands.

Soon he would haul himself into bed to fall asleep while thinking of all the food he would buy to replace the feast he had just eaten and sleep while all the food digested and became more soft, squishy fat for him to play with before he stuffed himself to brim again tomorrow.