Rarity snoozed happily, her head resting gently on a soft pillow, and a warm blanket covering her body. "Oh my," she thought, snuggling up to her pillow, "I haven't slept this well in ages! Oh, why does everything feel so perfect?" She wiggled around in her sleep, blissfully. "Oh, this blanket is so soft, the pillow is so fluffy, the floor is so cool..."

"Wait," she grunted, suddenly conscious, "Floor?"

She opened her eyes and looked around. The sun's rays were coming in through the kitchen window, and she noticed she was lying under a blanket on the floor. "What the..." she murmured, "What happened?"

"Oh, you're awake!" Sweetie Belle squeaked. She leaned down over Rarity's head, smiling brightly. "Hey, can you do me a favor and get up? I didn't want to wake you, but you wouldn't let go, so..."

"What?" Rarity asked. She leaned up, and Sweetie Belle immediately scooted backwards, sighing with relief. Turning her head, she spotted Sweetie Belle's massive mammaries, and her pupils shrank. "Whazzawhodatwhahuh?" Rarity blabbered, then suddenly everything from last night came rushing back to her. She laid there on the floor, frozen with horror, staring straight at her sister's boobs.

Sweetie Belle began to feel uncomfortable. "You're not gonna pass out again, are you?" she squeaked, raising an eyebrow.

Rarity snapped back to reality, blinking between the floor and Sweetie's pair. "Sweetie Belle, darling, was I laying on your...your..."

"Yep!" Sweetie Belle said, smiling, "Who knew these things would make a great pillow?" She patted her breasts, giggling as they were jiggling and giving her a funny, tickling sensation. Rarity groaned and flopped on the ground, exasperated, but felt Sweetie Belle tugging on her foreleg. "Come on, sleepy-head! I made you breakfast!" Rarity turned and opened the cabinet containing the fire extinguisher with her magic, but Sweetie Belle laughed and hugged her neck. "I didn't burn it this time!"

Rarity's eyes fell down and as Sweetie Belle pressed her giant melons against her chest, and she tried her very hardest to resist throwing her away from her. Once Sweetie Belle released her, she stood up, shaking the blanket off and sighing, then went over to the table. “Okay, if I’m going to fix this,” she thought, “I’m going to need to keep calm, and explain things politely.”

"See?" Sweetie Belle said, waddling over to the table, "I made you some cereal!"

Amazingly, Sweetie Belle hadn't caught the cereal on fire this time. Rarity made a mental note to celebrate it later. She raised her spoon and took a mouthful of cereal, chewing the mushy flakes and milk. "Thank you, Sweetie Belle," she said, giving her sister a reassuring smile. She went back to her thoughts. “Sweetie Belle said that she drank a potion to get her...things...so there’s probably a potion that gets rid of them," she mused, continuing to eat her breakfast. "Ahem," she said, getting Sweetie's attention, "Do you know how dear sweet Celestia, have they gotten bigger?!"

Sweetie Belle smiled sheepishly, holding her swollen breasts. "Yeah," she said, blushing, "My milk's coming in pretty fast, huh?" She hopped up next to her sister, carefully so to not hurt her bosoms. "I'm glad you were the first to try it, though!" she squeaked, patting her on the back.

Rarity set a land speed record for running to the sink, but her victory was slightly spoiled by the immediate vomiting that she did when she got there. She did however make a fantastically loud noise while barfing. It was a nice mix of "Eeeuuuaghh!" and "Bleehhoooo!" and, as the acoustics were great in the kitchen, it had a lovely reverberation effect.

When she was done, however, she turned back towards Sweetie Belle, wide eyed and breathing heavily. A small white streak leaked out the side of her mouth. "Sweet-urgh," Rarity started, then swallowed, "Sweetie Belle, why in Equestria would you make me drink that?"

"Well, technically you ate it with cereal..." Sweetie Belle said, bashfully. Rarity gave her a very intense glare, which made Sweetie nervous. "You aren't mad, are you?" she asked, making a worried smile.

Rarity took some deep breaths and tried to calm herself down so she wouldn't leap at and eviscerate Sweetie Belle. "Sweetie." Rarity said, then took a sigh before continuing, "How about we just forget this little incident?"

"Sure," Sweetie agreed, "but first, can you tell me how my milk was?" Rarity burped, momentarily holding her hoof to her mouth, but managed to keep it down. Sweetie Belle frowned. "Was it really that bad?" she asked, curling her tail around her forelegs while looking down.

"No, no, Sweetie," Rarity said, quickly rushing over and wrapping her in a hug to comfort her, "Your milk wasn't bad, it was delicious!" Then she blinked and looked straight forward. "Wait, what am I doing?" she thought, dropping Sweetie on the floor and tilting her head. She made a slightly horrified and confused expression. She looked down at her sister.

Sweetie Belle suddenly had a massive smile on her face. "Oh, I knew you'd love it!" she squealed with excitement, "Wait until I show everypony in class!" She gave her sister a big hug, then began waddling happily towards the front room to her saddlebags.

Rarity took a second to catch up with reality, then zoomed to Sweetie Belle and snatched her back inside, just as she was leaving. "Oh, no, Sweetie Belle!" she said, sternly, "You are not going to school today."

"Why not?" she replied, then looked happy, "Oh! I get it! Here." She trotted back into the kitchen, and opened the fridge, pulling out a couple bottles. "I bottled some up last night, just for you!"

"What?!" Rarity yelled, "When did this happen?"

"Silly!" Sweetie said, poking Rarity on the muzzle, "I just said I did it last night!" She pointed to her breasts, which made her sister cringe. "After you squeezed me last night, they wouldn't stop leaking, so I filled up some bottles from your recycling bin."

"Sweetie Belle, just..." Rarity facehoofed. She looked in the fridge, then nearly had a heart attack. "Oh dear sweet Celestia, how much milk did you make?" she asked, pulling out three more milk-filled bottles from the fridge.

"Hm..." Sweetie mumbled, putting her hoof to her chin, "I think I filled about a dozen bottles." She began to look and point around the room. "I also filled up those cups, those pans, Opal's bowl, some buckets, and the recycling bin, once I ran out of bottles."

Rarity looked as though she could faint. "Oh my word..." she muttered, utterly flabbergasted. She picked her hoof up to hold it near her forehead, then realized the floor was sticky. "What-"

"Oh, and I also spilled a bunch on the floor," Sweetie said, then added, "but I tried to clean it up!" Then, Sweetie Belle smiled and hugged Rarity, who was beginning to totter back and forth. "Not bad for my first night, huh?" she squeaked, "At this rate, I'll have my cutie mark in no time!"

Then, Rarity passed out.

Author's Note

I ran out of ideas for this chapter. Hopefully I'll have more for the next one.

Edit: Somehow I forgot the last line. Fix'd.