Like my other AU, "Potionate," but this is another way things could have gone wrong at the diner. All characters belong to Alex Hirsch, not me.

Potion Triangulated

Robbie took a closer look at the portion of chili fries in front of him. "Pink stuff? It must be some sort of mold. This is a new low for Greasy's Diner. I'm out of here."

"Me too," said Tambry, getting up from her seat and continuing her status update on her phone.

"Wait!" Mabel yelled, running out from behind the counter. "Please try them, just a nibble. I promise they will make you feel a lot better."

"So it was you who dumped the pink junk on my food!" said Robbie. "Trying to make it all cute for the blind date you set up, I guess. I should have known not to trust a Pine."

"Sorry Mabel, it's just not going to work," said Tambry. "Robbie and I are so not happening."

Mabel looked down at the floor, discouraged by the failure of her matchmaking attempt. Even with the help of a potion from a Love God...

"I'll try those fries, Mabel," said a familiar deep voice.

Mabel looked up and saw that Grenda had entered the diner while she was preoccupied. Candy wasn't with her today.

Grenda glommed a handful of fries and stuffed them into her mouth.

"Wait!" cried Mabel, but was too late. Quickly Mabel pulled off her sweater and threw it over Grenda's head. Fortunately for her modesty, she had another sweater on underneath, her rainbow prism one.

"There was love potion on the fries. Don't look at anyone or you'll fall in love with them."

"Huh?" said Grenda. "Love? Mabel, are you flirting with me? That's really nice..."

"No!" Mabel said, "Hurry, we've got to get you to Dipper at the Mystery Shack. He'll find something in his book to take the love spell off of you... I hope."

Grenda giggled. "You want me to go home with you blindfolded? Sure!"

Mabel hustled Grenda out the door and onto the sidewalk.

"Just a second, Grenda. I have to dispose of the extra fries before they do any more damage."

Mabel turned back and carefully picked up the paper container of fries by its corner and got it into the trash without touching any of the potion.

While she was gone, Grenda groped forward. "Mabel? Don't leave me here alone."

Grenda's right hand, still sticky with pink sauce from the fries, touched someone passing by on the sidewalk.

"Hey, you got your pink mess on my white blouse," said Pacifica Northwest. "Who do you think you are? And... where have you been all my life?"

"Pacifica! No!" said Mabel. She pushed between Grenda and Pacifica.

"There you are, Mabel!" cried Grenda. "I hear you!"

She hugged Mabel from behind, getting potion on her as well.

Mabel was looking at Pacifica, and she felt a surge of feelings well up. Why hadn't she realized it before? Pacifica was perfect for her.

Pacifica reached around Mabel and pulled the sweater off of Grenda's face.

"Grenda, it's you! All of a sudden you got a lot more likeable," said Pacifica. "Out of my way, hobo Mabel. I've got to talk to Grenda."

"Stop teasing me, Pacifica," said Grenda. "I don't like you. I never did. But I like you, Mabel, a huge huge bunch."

Mabel looked at them both. Pacifica glared at her, and turned to Grenda with a look of adoration. Grenda looked at Mabel with eyes full of longing.

"What have I done?" said Mabel. "I've turned us into a tragic love triangle!"