Alphys awoke slowly, having spent the last 2 hours watching cartoons with Undyne.
Undyne: "Good morning sleepy-head!"
Alphys struggled to get up from the couch. With Undyne's constant cooking and Papyrus' occasional visits, Alphys had recently put on a lot of weight. Although Undyne had eaten just as much as Alphys, her figure had somehow remained in perfect form.
Alphys: "How long was I asleep?"
Before Undyne could answer, Alphys's stomach grumbled loudly.
Undyne: "Long enough for me to cook us up a breakfast we'll never forget."
Alphys could already smell Undyne's favorite food from the surface; pizza.
Undyne: "Come on let's eat!"
Alphys was beginning to feel concerned about her recent weight gain. Most of the weight had gone to her legs and chest but enough had gone to her belly to cause her lab coats to fit more snugly. Her face had rounded out a bit as well, with a double-chin that only appeared when she leaned back on the couch. Her breasts were about the size of two small watermelons.
Alphys walked into the kitchen to find three large pizza boxes sitting on the table.
One was a standard Pizza with pepperonis
The second was a cheese pizza which had an entire pot of spaghetti poured on top of it.
And the third was a cinnamon-butterscotch pizza cooked by Toriel.
Alphys looked at the food with concern. Undyne noticed this.
Undyne: "What's wrong my love? Would you rather have glamburgers?"
Alphys: "Honey, do you think we need to start eating healthier?"
Undyne: "Why would we do that?"
Alphys: "Look at all this weight I've put on recently!"
Alphys was crying. Undyne looked at Alphys for a few seconds then leaned over to whisper in her ear.
Undyne: "To be honest, I think it makes you look really sexy."
Alphys blushed deeply.
Alphys: "Really?"
Undyne picked up Alphys and kissed her passionately for a few minutes.
Alphys reached to unbutton Undyne's top and Undyne stopped her.
Undyne: "Come on let's eat! We'll get to that after we're finished"
Alphys: "Okay. I'm ready.
Alphys sat at the table as Undyne quickly cut the pizzas with her spear.
Undyne: "Which one do you want?"
Alphys looked shocked.
Alphys: "Do I have to eat the whole thing?!"
Undyne reached under the table and rubbed her hand on Alphys' thigh.
Undyne: "Only if you think you can, sweetie."
Alphys felt strangely turned on by this.
Alphys: "Okay, I want the one with spaghetti."
If she was going to gain weight for Undyne she needed push herself.
Undyne: "Oh that's the one that I made! Can I feed it to you?"
Alphys opened her mouth as if the food would go flying in. Before she knew it a slice of pizza was shoved into her mouth. It took her only a few seconds to eat it. Alphys began to imagine what her and Undyne would do after this feast. Another slice was shoved in her mouth. However Alphys couldn't help but rub herself down under. Undyne noticed this.
Undyne: "Someone's getting excited."
Undyne had a big cheesy grin on her face.
Alphys stammered: "What! Um I. . ."
Before she could finish Undyne had already fed her another slice.
Undyne: "It's okay. Don't stop. It turns me on too."
Alphys returned to fingering her clit and as she finished the fourth slice of pizza, she orgasmed.
Undyne: "Save some for me, okay sweetie?
Alphys only now began to realize how full she was. Her lab coat's buttons were being strained by her stuffed belly.
Alphys: *groans* "Honey, I don't think I can eat anymore."
Undyne had already finished the pepperoni pizza during this meal and Alphys had only ate half of hers.
Undyne: "Are you sure? I think you could finish this whole thing!"
Undyne unbuttoned the top three buttons on her jacket as if to tease Alphys.
Undyne: "Or are you just ready to see these."
She pressed up her breasts in her shirt. Alphys gulped nervously.
Alphys: "Okay. I think I can do this. Give me another one."
Alphys devoured the last four slices of pizza with great effort.
Alphys: "Ohhhhh! Everything hurts!"
Alphys noticed Undyne already had a wet spot on her jeans. Undyne helped Alphys to the bed. Undyne leapt on top of Alphys causing her to fall onto the bed. Alphys' buttons on her lab coat had become so restrained that a few popped off when she landed on the bed. Undyne began kissing Alphys and caressing her now exposed belly. Undyne removed her own clothes and the rest of Alphys' clothes for her. Alphys layed there, unmoving as Undyne pleasured her.
Alphys: "OH! OH!"
Undyne licked and stuck her fingers in Alphys' clit while rubbing her distended belly. It only took a few seconds for Alphys to orgasm. Undyne licked it up happily.
It was now Undyne's turn. Alphys rolled on top of Undyne.
Undyne: *grunts*
Alphys: "Oh! I'm sorry are you okay!"
Undyne: *Nods* "Ready for dessert?"
Alphys began licking and fingering Undyne's pussy similarly.
Undyne: "OH OH OH!"
Undyne took a bit longer to cum but Alphys was prepared and had her mouth covering Undyne's clit when she came so that she could get every last drop.
The next day Alphys' knew she wanted to gain more weight and luckily it wouldn't be that hard for her. Undyne already had already prepared a large breakfast for her. Four eggs, a plate piled with bacon, and six sausage patties.
Alphys was still shocked by all the food.
Undyne: "Ready to eat?"
Alphys: *stammering* "Yes."
Alphys sat in the chair once again and prepared to stuff herself once again. Undyne started by feeding her the eggs. Each bite turned on Alphys more and more.
When Alphys finished the eggs Undyne began sucking on her tits.
Alphys: "OH God! Honey if you do that I won't be able to. . ."
Before she could finish Undyne shoved three strips of bacon in Alphys' mouth. Alphys came the moment the bacon hit her lips. Once she had finished off the plate of bacon Undyne took three sausage patties for herself and fed the rest to Alphys. Alphys was feeling full but wanted to impress Undyne even more.
Alphys: "Um. . . Do you think I could have some of that pizza that Toriel made?"
Undyne even looked suprised by this.
Undyne: "Are you sure you can handle that?"
Alphys: *burps* "I'll just have a few slices."
She ate the first slice slowly. Her pants were straining her expanding belly. Undyne helped her unbutton them and the doughy mass popped out quickly.
Alphys: "Ha! Look, now I have more room!"
Undyne prepared to feed her another slice.
Alphys: "Wait. Can you stack another one on top of it?"
Undyne did as Alphys said and Alphys finished the pizza much more quickly.
She was so full now that Undyne had to carry her to bed. Neither her pants or lab coat were able to button after that large stuffing. No sex this time, Alphys needed the rest however Undyne pleasured herself after the dinner
A month passed by as Alphys continued to gain weight. Undyne now had very little room on the couch since Alphys' rear now filled up one and a half cushions. Her breasts were enlarged as well, but the most prominent feature was her new giant belly. She could fill it with two large pizzas and still be ready for dessert. Alphys sat on the couch with Undyne squeezed under part of her belly.
Alphys: "Honey, could you get me another soda?"
Undyne quickly grabbed her a two liter bottle of cola and Alphys chugged it down quickly.
Alphys: *burp* "Ohh. . . I drank it too fast."
Alphys burp got Undyne excited and she unbuttoned Alphys' new lab coat. Muffet had it made extra large for her.
Undyne: "Wait I have one more suprise."
A few minutes passed and Undyne walked back in from the kitchen. When she returned she was completely naked and holding two large plates filled to the brim with food. One had twelve Hot Dogs drenched in ketchup and the other had the largest pot of sphaghetti Alphys had ever seen.
Undyne sat the plates onto the table in front of the couch, grabbed a hot dog and gracefully jumped atop Alphys' belly. She licked the hot dog seductively and then stuck half of it into her mouth. She leaned in so Alphys could bite the other half. They chewed together until Alphys swallowed the remains and the feeding became a short kiss. Undyne grabbed another hot dog and, this time fed it to Alphys normally. Undyne began fingering Alphys while grabbing two hot dogs at once. She shoved them both in Alphys' mouth and Alphys looked suprised but accepted them happily. On the fifth hot dog Undyne took the dog out of it's bun and rubbed it against her clit, leaving behind her orgasm. She shoved it back in the bun and fed it to Alphys.
Alphys: "OH OH OH yes feed me all the dogs that way,"
Alphys orgasmed after this hot dog.
Alphys finished the rest of the hot dogs very quickly.
Alphys: *out of breath* "I think I'm done dear."
Undyne: "Wait, I have one more suprise for you."
Undyne picked up the pot of spaghetti in one hand and Alphys in the other, with ease.
She layed Alphys on the bed and proceeded to pour the sphaghetti all over herself.
Undyne: "Oh dear! I'm so dirty. I wonder who will help me clean this up.
Undyne jumped on the bed and Alphys rolled on top of Undyne and began eating all of the spaghetti off of her, from her face all the way down to her feet. Undyne sucked Alphys' tits and Alphys sucked Undyne's. They fingered each other until each had a massive orgasm. After one final lick clean they were ready to go to sleep.
A year had passed and Alphys had gained much more weight. Her butt now took up the entire couch so Undyne had to buy herself a chair to put next to it. Her belly nearly hung to the floor and her breasts were large enough to act as a table.
Undyne: "Do you have everything you need my little piggy?"
Alphys: "A chocolate cake sounds good right now."
Undyne prepared a chocolate cake and Alphys ate it without any silverware and made *oink* noises to turn on Undyne. Alphys finished the cake like it was a small cupcake.
Alphys: "Could I have another please?"
Undyne brought in another cake but this time Alphys noticed something was wrong. Undyne was holding her breath.
Alphys: "Why are you holding your breath, Dear?
Undyne didn't say anything and just stood there for a moment. She finally breathed in some air and her shirt tore, revealing a small pot-belly.
Undyne: "Yea I guess this food has gotten to me too."
Alphys couldn't help but grin.
Alphys: "Well, little piggy, do you want to share this cake with me?
Undyne: "Heck yeah!"
Undyne sliced the cake in half and swallowed her half hole.
Alphys felt pleasure from this.
Over the next few years Alphys continued to gain weight and Undyne stopped at 250 pounds so that she could continue to care for and pleasure Alphys. Alphys had become bedridden and had to be fed constantly to continue her weight gain. Alphys' butt covered half the bed and her belly covered the rest. Her breasts could hold 2 gallons of milk which Undyne would suck on to maintain her figure. When Undyne fed Alphys she would always pleasure her once she finished a meal. The standard meal now was four large burgers, twelve hot dogs, four liters of soda, two birthday cake, and Undyne's "personal snack."
Undyne walked into the bedroom, her whole, naked body covered in cake and frosting. She was holding a plate of cookies. "Hungry?" she gave Alphys a seductive smile. Alphys smiled and said, "Always."
