Muffet hummed merrily as she was getting her delicious sugary pastries ready in the dark void for which she made her humble home, humming to herself while using her many spider arms as she felt her stomach growl, gasping as she placed one of her hands up to her mouth.
"Uh oh... I think those yummy sugar cookies I did as a test are starting to backfire..." Muffett stated in a singing tone as she farted out a cute little poot, giggling innocently as she fanned the air with one of her left hands while placing one of her right hands on her fart filled stomach, letting out a thunderous bassy fart shortly afterwards that made her blush in arousing embarrassment. "Oh my... hopefully they won't mind my stinky melody..."
MEANWHILE
"Nice of Muffet to invite us over for a picnic, eh Papyrus?" Sans said to Papyrus as the two boney skeletons were heading to Muffet's corner, with Mettaton appearing over a bunch of rocks and chuckling in a metallic tone as cheerful music based on an obscure 1933 song was playing, y'know in the background.
"I HOPE SHE MADE LOTSA SPAGHETTI!" Papyrus happily stated, even though he would rather be with Undyne.
Suddenly, the two skeleton bros stopped in front of the entrance to the cave where Muffet was waiting, with Sans walking towards the way they came as Papyrus shrugged and walked into the cave, only to be reduced to a pile of bones from Muffet's gassy explosion.
"Sorry about that!" Muffet exclaimed as she emerged from the cave, fanning the air with two of her hands on both sides of her gas expelling body as she blushed, her flatulence smelling like sugary sweetness. "I think those cookies I prepared for you... were a bit too much on the flour side."
"You certainly dusted up his rusty old bones," Sans stated with a bad joke as he popped up next to Muffet, having that derpy smirk of his as Muffet giggled, with Papyrus groaning as he put himself back up together.
"I say, what was that explosion that knocked me on my bony feet, nye heheh?" Papyrus stated in confusion.
Another rumble in her stomach, Muffet farted as Papyrus had his jaw literally drop to the ground, with Sans simply having a chuckle himself, as he knew it was gonna be one of those days.
Get the hint?