Author's Notes:

This chapter was done by request. I don't know if its quality will be as high cause I don't usually fetishize Vinyl Scratch, plus it's harder to want to fetishize the ponies when I'm watching new episodes, but I'll do my best.

Vinyl Scratch was at home. She didn't have anywhere she needed to play her records tonight. And Octavia was going to an event at Canterlot to play her cello. Vinyl had eaten a specific kind of dinner in anticipation of having the house to herself this night.

"All right, I'm going to Canterlot," said Octavia as she walked out the door with her cello.

Vinyl waited another ten minutes to make sure Octavia was gone. Then, she put on a pair of blue panties which matched her mane, and lifted her leg.

PPPPPPPFFFFFFFFFFT!

She felt immense relief, for she'd been holding it in for quite a while before Octavia left. Usually when Octavia was around she'd fart silently where Octavia couldn't smell it, as she was the type to be disgusted by farting.

Vinyl released another explosive fart that exceeded her first fart in length and volume. Her dinner had consisted of everything in Equestria that could make a pony gassier than normal.

Then, she let out several farts at once.

PRRRRRRT! BBBRRRRRRT! FFFFFFRRRRRRT! BBBRRRAAAAP!

Vinyl was having a lot of fun with this. She was sure her panties were smelling like farts now, occasionally slapping her butt after a particularly loud or wet fart.

She paused for a minute. This next fart felt like a big one.

PPPPPPPFFFFFFFFFRRRRRRRRRRRRRRT!

Vinyl nearly sighed in relief. This was her loudest and longest fart today. Then came a shorter, slightly quieter fart.

For a few minutes, it seemed as though her gas was gone. Vinyl was disappointed that this couldn't last longer. The room was full of the smell of her farts, so she'd have to open a window to air it out before Octavia got back.

Then, the next wave of gassiness came, and Vinyl let loose with a series of farts. She was enjoying this so much she barely noticed how they got dirtier and wetter as time went by.

And then...

PPPPPPPPBBBBBBLLLLLLLRRRRRRRRRT!

Liquid diarrhea splattered out of her and into her panties, flowing down her legs and making a mess on the floor. But her underwear took most of the damage.

Vinyl stood, shocked at that had happened. In all the times she farted, she had never soiled her panties like this.

The stench of diarrhea drowned out the fart smell. Once Vinyl got over the shock, she walked to the bathroom to take a long shower.

She felt the second wave coming. She rushed to the toilet and sat down, leaving her panties on as she released the very liquid contents of her bowels again.

Once she'd washed thoroughly, she threw her stained panties in the wash and cleaned up her mess on the floor.

The house was smelling clean by the time Octavia returned. She had no idea what happened while she was gone.