The three girls followed Circe past the aisles of magical artifacts and into a side room. The room was strewn with beanbags, but was otherwise without furnishings. On three of the beanbags sat the largest girl Sammie, Sierra, or Krystal had ever seen. Her pendulous belly spilled out of her shirt and onto the floor, large enough to fit a person comfortably inside. Thick rolls of fat enveloped her arms and legs, trying to crowd out her hands and feet. Her bulbous breasts made watermelons look small, and it was impossible to know where her neck ended and her flabby cheeks began.
"Girls, this is Monica," said Circe. "This room is our Fat Donation Center. We have other, slower methods of gaining, but those who have used them are sometimes willing to donate excess fat to the less patient. And then there's the people who started fat and wanted me to turn them into those skinny twigs that are so fashionable these days; I accomplish that by giving their beautiful girth to someone who will actually appreciate it. That's how Monica achieved such an impressive size. She actually absorbed the fat of two would-be toothpicks. Unfortunately, her doctors are insisting she lose a few hundred pounds for health reasons. She's here to give up just a smidge. Of course, what's just a smidge to her is a mountain to you. How much do you weigh, Sammie?"
"100 pounds," Sammie answered.
"I see," said Circe. "Monica weighs 900 pounds exactly. I think she ought to have enough chub to spare to get you to an adequate size. Now, I'm going to prepare the spell, and then you clasp hands with Monica and think about drawing her fat into you. Stop when you're done, but try not to take more than she's comfortable surrendering."
Circe then dabbed each girl's hand with sacred oil and chanted something under her breath. Sammie assumed it was an archaic dialect of Greek. Once Circe stopped, Sammie walked up to the roly-poly beauty and buried a hand in the soft pudge of her gargantuan potbelly. It was so jiggly! The skinny girl couldn't wait to have a belly like that. She took Monica's chubby fingers in her one and greeted her.
"Hey there, Monica," she said. "I'm Sammie. You're gorgeous, you know that?"
Monica smiled and blushed. "Thanks. I hate to give up even a single pound, but I guess I' have to. Doctor's orders. But try not to take too much, no more than 250 pounds. That okay?"
"Uhh, Yeah?" Sammie mumbled. Honestly, she would LOVE to take it all and have a gloriously obese butterball of a body like Monica. She could probably take nearly all of it once she started; Circe and Monica had both asked her not to like it was under her control... but it'd be a total dick move considering how much Monica clearly loved being fat. Then again...
Sammie took a breath and willed the transfer. She knew what she wanted. Sierra and Krystal watched in awe as the magic begain, eager to see just how big their new friend would get.