As the Rainbooms made their way to school, they all ran into the bathroom with their sisters, Rainbow going a step further to hide in a stall so she could take off the hooded-sweatshirt.
Applejack was extremely messy, Rarity was wearing a dress made of tape and a few pieces of fabric, Rainbow kept away from everyone else, Fluttershy wouldn't go anywhere without her brother and just held onto him, heaving, and Pinkie was still a little confused.
"Darlings, this has to be Sunset's revenge magic, though we can only speculate."
"Exactly, Sugarcube. We have to right our wrongs with her an' hope she'll forgive us."
"Me first!" Dash said, "I can't go around like this!"
"Darling, please-" Rarity said, but was interrupted by Sunset and Autumn going into the bathroom.
"And here I am-" they noticed everyone, "What happened?"
All at once, the Rainbooms tried to make things right with Sunset, but for her and Autumn, there were more important things to do, more along the lines of
"What in Tartarus happened‽" Sunset said.
"Revenge soul magic," Zephyr said, "Please turn it off!"
"Wha-?"
"This" Rainbow Dash said, stepping out of the stall, "Please fix me!"
Everyone in the room succomed to varying degrees of nausea, with Autumn puking a decent amount, "And I've had Sofia and Seth's cooking before."
"Sunset, we'r-"
"Time for that later, you need to get to a hospital or anywhere you can get help! That's not normal! Even Alicorn magic doesn't manifest as such!"
"Sunset?" Autumn said, "Who and/or what did you say your dad is again?"
"That... is an excellent question," Rainbow Dash began to lose consciousness, "Get the paramedics!!" Sunset said, running out to the portal, screaming "call 911!"
"We're cool now, right?" Pinkie yelled.
"Yeahwe'refinenow!"
"I think that's a 'Yes'," Autumn said as she was washing the puke out of her mouth and Rarity was laying Rainbow down.
Running through the portal, Sunset completely ignored the human-to-pony process, instead ending up hurting herself.
"Sunset?" Princess Celestia said, worried.
"Ow," she said, getting up and noticing her mom and Twilight having breakfast, "Mom! I'm sorry about what happened wh-"
"What's wrong?"
"Something happened on the other side of the portal, and we need to know who my dad is! We think it's some weird magic!"
"Sunset, your father is Discord."
Sunset's world, along with Twilight's, came to a screeching halt.
9409658
I'll come clean. I didn't know how to do hers. Confusion was really the only thing that came to me, and that was with a friend's help.
(3:44)
9409803
The thing about Seth and Sofia is that neither have any real morals and they're a little crazy. Sofia, though, works along the mindset of "My vengeance is justified, regardless", while Seth's is "Vengeance should be somewhere between trolling them and smacking them back to reality".
Basically, if he were in charge, it would be they broke in and screwed with stuff, but it's entirely possible that he wasn't quite thinking when it started until it was, essentially, too late to back out.
9409813
In other words he a moron. Look i'm all about getting the Rainbooms punished, but in the right way. this this is is....STUPID, TASTELESS, AND WRONG!
Apple Jack's entire family was punished, Rainbow it went too far, and Fluttershy did regret how she treated Sunset.