Undertale Weight Gain Story

  [0] Flowers
"Come on! I want to show you something!" Asriel said as he led you by the hand through a field of yellow flowers. He began running and it was difficult to keep up.
You stop to take a breath only to see Asriel fall into the field of flowers. You run toward where he fell only to see he's completely disappeared.
'Where did he go?' you wonder. Maybe he was playing a joke on you.
Suddenly your feet began to quickly sink into the flowers. They were already up to your chest.
As the flowers hit your nose, a wonderful smell emanated into your nostrils.

[1] A Mother's Love
Toriel always knew the best way to wake you up. The sweet smell of a slice of cinnamon/butterscotch pie on your nightstand every morning.
You wipe the crumbs off your chest and try to pull your shirt over your belly but it quickly rolled right back up. The only downside to eating Toriel's delicious food was the weight you had put on. You decide to ignore the shirt and eat the pie. Tasty, like always.
"Good morning, sleepyhead! Did you enjoy your breakfast?" Toriel says as you walk into the living room.
You nod and give her a hug.
"Oh dear! Let me see if I can find a new shirt for you to wear." Toriel quickly comes back with a new shirt. You put it on and it slides over your gut, covering it entirely. It feels so soft and warm, just like Toriel's fur.
You run over and give Toriel another hug, but your stomach lets out a loud growl.
Toriel chuckled, "Oh! It sounds like someone's still hungry. Let me fetch you another slice."
You run to the table, excitedly. Toriel sat a generous portion of pie in front of you and you dig in quickly. After finishing, you can't help but lick your lips and rub your now stuffed tummy.
Toriel pats your tummy and kisses you on the head.
"It warms my heart that you love my food so much. Why don't you go play while I get lunch ready?" she said.

[2] Sauce
"Welcome back! Are you ready to try a bowl of my delicious spaghetti?" Papayrus looks extremely excited. You're hesitant because most of the time Papyrus' spaghetti was frozen or just covered in bones.
You took the bowl. It wasn't frozen, and you saw no bones. It's probably safe to take a bite.
It tastes like heaven.
Papyrus saw your face light up, "Oh, I'm so happy that you like it!"
You quickly eat through the bowl and have no choice but to ask for more.
Papyrus has plenty of spaghetti for you. Seconds, thirds, fourths, and every bite is delicious. Halfway through your fifth bowl, you look at the clock. It was only 5 minutes until lunch-time and you're already full of food. You let out a loud belch and tell Papyrus you have to go home.

[3] Plenty of Room
Arriving home, the smell hits you. Double Glamburgers. Toriel had put a lot of effort into this meal and it smells delicious.
You sit down and start eating with her. The burger tasted amazing but it was hard to keep down because of the spaghetti. Toriel sees you struggling.
"Oh, come now sweetie. I've seen you eat more than this. Come here." Toriel comes around the table to feed you the burger in little pieces.
After finishing, Toriel brings your overstuffed self to the couch to lay down.
"I think you've had plenty of food, sweetie. Take a little nap so it can settle." she said, softly.
She rubs your belly and pats your head. It felt so nice, and you quickly drifted off to sleep.

[4] Cookies
"Mmm. You need to try this." Asriel is sitting next to you on the couch but he looked a lot different. He's big enough to take up half the couch and his belly hung way over his legs.
He stuffs a cookie into his mouth and then yours. It tastes so good. You grab one and scarf it down. You look down at your body and realize that you've lost control of your arms. They're stuffing more and more cookies in your mouth. Your body quickly inflates in front of you. Soon the couch collapses underneath the mass of you and Asriel. More and more cookies went in as you both grew and grew.
Suddenly, the taste of frosting hit your mouth.

[5] Mom Knows Best
You wake up, back to your normal-sized self.
Toriel had put a spoonful of frosting on your tongue to wake you up. You lick it off and sit up.
"Sweetie, you ought to go out and play before dinnertime." Toriel said.
You get up and head for the door.
"Oh, sweetie! Take a couple of those cupcakes with you. I don't want you eating up all of Papyrus' spaghetti." Toriel teased.
You ask her how she knew.
"Well, I'm a mom, and moms always know everything right? Like... I know you're going to love those cupcakes." Toriel said confidently.
You grab two cupcakes and take them with you.

[6] Buttery Goodness
By the time you reached Alphys' and Undyne's house, the two cupcakes were gone. You wipe the frosting off your chin as you knocked on the door. Alphys is waiting at the door but she looks different. It looks like someone has inflated her front. Her belly sticks out and her breasts barely fit into her lab coat anymore.
"Oh, hello, Come in!" Alphys said.
Alphys offers you a chair at the table. Undyne is busy in the kitchen, cooking frantically.
You couldn't help but stare at Alphys. She looks as if she's doubled in size.
"This is what Undyne's cooking will do to you." Alphys teased as she pats her massive belly.
"You're in luck, friend. I just finished another delicacy!" Undyne said confidently.
Undyne brings a large pot to the table. It's some sort of pasta. You can see two half-melted sticks of butter in the bowl.
Alphys licked her lips "You have to try some of this, it's one of my favorites" said Alphys as she digs into the bowl. You quickly realized where Alphys' weight had come from.
It smells delicious but you're hesitant to eat. Toriel would have food ready soon.
But, One bite couldn't hurt, you suppose.
The taste was so warm and sweet you struggle to not take another bite.
You put your fork down and tell them you have to go.
Alphys looks confused "Why don't you have some more? There's plenty!"
You shake your head, say you're full and head for the door.
Undyne throws a spear at the doorknob.
"Not again!" Alphys shouted.
"I INSIST THAT YOU HAVE MORE!" Undyne shouts. You must have hurt her feelings. You sit back down, fill your bowl with pasta and dig in.
Once you and Alphys empty the bowl, Undyne seems satisfied.
"Oh, you two are so nice. You ate all my food!" she says happily. Both you and Alphys are leaning back in your chairs, so stuffed that your buttons had come undone.

[7] Too Much
Toriel has prepared a grand feast. On your plate is a large steak and two slices of cinnamon-butterscotch pie. Toriel looks at you and smiles as you sit down.
"Alright, dig in!" You start with the steak. It looks massive. You take one bite of the steak. Your stomach gurgles as if it was saying 'No more!' yet, you take another bite. You continue eating the steak. Your belly is so full now, the shirt Toriel got for you is already riding up.
After much effort, the steak is gone. You lean back and look at your distended belly. It feels as tight as a drum.
"Are you ready for dessert, sweetie?" Toriel asked.
A no forms on your lips but Toriel has already placed a small bit of pie in your mouth. Suddenly, something comes over. A will, a drive to finish the meal Toriel had cooked for you. Not only are you filled with food, you're filled with DETERMINATION! You grab the slices of pie in each hand and start biting off huge chucks. You finish them very quickly.
"Oh my goodness! I knew you could do it!" Toriel says excitedly.
With your extremely-stuffed tummy, you head to bed, excited to find out what Toriel would cook next.

[8] Jiggle and Jiggle
The smell of cinnamon and butterscotch hits you once again. A month had passed and Toriel's cooking has really done work on your body. Your butt and belly stick out about six inches all around.
You lean up from your bed.
*SNAP*
Your pants have torn and your massive belly is leaking out. You look over to see a whole cinnamon-butterscotch pie on your nightstand. Your belly gurgles loudly and you grab a slice, then another, and another... Until the pie was gone. Each bite tasted so sweet. It tastes like Toriel has put a little extra sugar in, just for you!
You head into the living room to see Toriel.
"Good morning, my child. It looks like you enjoyed your breakfast." Toriel chuckles. She goes back to her room to grab you some new pants.
"Here you are sweetie. These will give you plenty of room!"
The pants are super stretchy and soft. You put the pants on, but leave your belly out.
"My, my. Look how much you've grown." Toriel says.
You puff your belly out proudly and Toriel ruffles your hair.
"Alright. Do you think you have room for ice cream?" she asks.
You nod, excitedly and start to head for the door.

[9] Ice cream
You lick the chocolate off your lips. Toriel has treated you with huge bowl of chocolate ice cream. Or... maybe this is your third bowl. You can't seem to remember. Halfway through the bowl, you realize how stuffed you are.
"Honey, you'd better finish that bowl. I've already payed for it." Toriel takes the spoon and brings a scoop of ice cream to your lips. You take it without hesitation. You know how happy it makes Toriel when you finish all your food. She spoonfeeds you the rest of your ice cream. You burp up a little chocolate and lick it off your chins.
"Hm hm, You sure were hungry!" Toriel chuckled.
Suddenly, you hear a confetti horn blow on a low-quality speaker.
"Congrats to the customer who just ate eight bowls of our 'Super Chocolatey Choco Ice Cream!' Prepare for a gift of DELICIOUS proportions!", The speaker shouted.
A worker pulls the chair out from behind you and quickly replaces it with a much cushion-yer chair before you can fall. A bib is wrapped around your nonexistent neck and before you know it, workers are feeding you all kinds of different ice cream. You were so full but every time you empty your mouth to speak, another scoop goes in. You've eaten so much and you let out a muffled moan of help.
"I think that will be enough." Toriel told the workers. You struggled to keep all the ice cream down but still managed to get up off the chair and walk home with Toriel.

[10] Doughnuts
Only two hours later and you feel hunger in your massive gut once again. You grab your belly and shake it a little. It had already looks bigger from all that ice cream.
You hear Toriel call from the kitchen "Lunch is ready!"
You waddle into the kitchen to see what she has prepared.There's no food on the table.
"Sit down, sweetie." she said softly.
You struggle, but manage to get up into the chair. You wait there for a minute and Toriel comes back with a plate-full of glazed doughnuts. It looks like it was about 2 dozen of them and they look delicious.
"Open wide!" she says.
You open your mouth and Toriel flies the donut into your mouth like an airplane. You chew it up with the biggest smile on your face. Toriel's homemade donuts were the best thing ever. Toriel grabbed another donut and fed it to you. You let out a little belch.
"I'm so happy you're enjoying this." She says, smiling.
You ask her for another one. She quickly grabs two and put them in front of you. You grab one with each hand and began munching on them left and right.
By the time you finished the first dozen, your belly is stretched out so much that you've had to pull your pajama pants under your belly. You pulled up your shirt and Toriel began rubbing your bloated belly. Toriel hands you a glass of milk. You chug it down with ease and let out a loud and long belch.
"Are you ready for more, sweetie?" Toriel chuckles.
You look down at your massive stuffed gut and nod, licking your lips.
Toriel slowly feeds you the rest of the doughnuts, each one more tasty than the last. By the time you finish the donuts, you're so stuffed that you can't move. With much effort, Toriel helps you to your bed.

[11] Cake
"Ha ha! Look at us!" Alphys said, excitedly. Alphys' belly is massive and she clearly cannot move.
You watch Alphys scarf down a couple of shakes and a pizza. She looks amazing.
"Undyne is a wonderful cook. I can't stop eating her food!" Alphys chuckled.
"Well, get ready cause I've got a surprise for both of you!" Undyne said from the Kitchen.
Undyne comes into the room after a few minutes with a gigantic cake. She laid it on the bed in front of Alphys.
"Okay! Both of you, Dig in!" Alphys sticks her face in the cake like a pig and begins tearing it apart. You quickly join in. It's messy, but a lot of fun. Frosting is all over your face and shirt.
When you both finish, Alphys gives you the honor of licking the plate clean.
You're feeling pretty stuffed but you hear Alphys' gut growl.
"Do you want those brownies I made, dear?" Undyne asks.
"Yeah that sounds pretty good." Alphys says, cake still all over her face.
"Here why don't you take some home with you?" Undyne asks.
Undyne sends you home with a few brownies. Sadly, they ended up in your stomach with the cake.

[12] Limit
A few hours later and after a nap, it's time for dinner. After the doughnut stuffing, you have no idea what Toriel has planned. You open your eyes to see Toriel sitting on the edge of your bed. There's a tray in front of you.
"Surprise! Dinner in bed! Don't get up. I'm going to go get your food." She says.
You lean back and rub your tummy, excited for what's to come.
She comes back with a large plate of hot dogs. Toriel sends one toward you, making little train noises. You bit into it.
Again and again.
More and more went into your mouth.
You don't know how many hot dogs there are, you only know that you want to eat them all. After twenty, there are still more on the plate, but the tray is getting pushed away by your stuffed gut. You could no longer reach the tray by yourself, so you lean back and let Toriel feed you more. At thirty-six hot dogs, the plate was empty. Toriel pats your distended belly.
"Are you ready for dessert, sweetie?" Toriel asked softly. You felt like a balloon that was ready to pop but Toriel had already left the room.
A moment later, Toriel comes back into the room, holding a plate of cupcakes.
You never noticed it before, but Toriel has put on a bit of weight as well. It wasn't noticeable at first glance , but her hips look a bit wider and her belly pokes out a bit more. As you were looking at her, a cupcake was fed to you. You continued eating and complimented Toriel.
Toriel blushed, "Oh... Well, thank you sweetie." She said.
Toriel snuck the last cupcake for herself then proceeds to rub your tummy.
"Do you like this, sweetie? Is this what you want to keep doing?"
She looks at you for an answer but you had already fell asleep but she knows what you want

[13-End] Immobile
One year had passed and you've finally done it: You're immobile. Toriel had to give you her old bed, because you broke the child's bed you used to sleep on. Your rear-end is already hanging off the edge of Toriel's bed, and your belly has very little room in front of it. Toriel walks into the room with a plate full of various food, then another, and then four more. This was nothing for you now. As you were munching away at the food Toriel asked, "You seem to be enjoying this." She smiled and patted your huge belly.
"How much more are you going to grow?" she asked.
You told her you would only stop eating when she stopped cooking.
She laughed, "Alright, sweetie. Be sure to eat all of the burgers! Don't want you going hungry."
A pile of twenty-five burgers lays in front of you along with a couple of whole cakes and a pizza. You quickly chug a gallon of milk and then open wide to prepare for another delicious feast.