Sarah was having an awful day. It was bad enough that she was suddenly so chubby that her clothes were all uncomfortably tight; but people kept whispering about her weight within earshot of her, and she could feel her clothes getting a bit tighter every time.
"Psst, do you see how much Sarah has porked out lately?"
"I heard she was pregnant, but I think she's just getting fat!"
"Why did she wear such tight clothes today? You can see her guy hanging right out of her blouse."
Sarah tried to take it all in stride. Her huge belly had vanished overnight, and she was hoping that this fat would disappear too. She had a suspicion that Karyn was behind this, even though Fat Kim had actually pronounced this... curse, or whatever it was, on her today.
Sarah's breaking point came when she dropped a pencil in math class. As she bent over to get it, someone said "Wow, dat ass!" and she felt her clothes tighten. Before she could react, there was a ripping sound, followed by peals of laughter from several students in her class. Sarah shot upright, realizing that the seat of her pants had just split open. Her sudden movement as she stood up and reached a hand to feel the seat of her pants, however, caused several buttons on her blouse to pop off and scatter across the room.
As her blouse fell open, revealing her belly, and her boobs straining to escape an overly tight bra, Sarah felt her face flush hot red with embarrassment. She ran for the door and ducked out into the hall before she broke out in tears of embarrassment.
Holding the scraps of her blouse together, Sarah jogged to the bathroom as quickly as she could. Moving all of this extra weight around was tiring, though, and Sarah was hot and sweaty by the time she made it into the bathroom. She was hoping for privacy, but was surprised to see an unfamiliar girl in a slutty blouse and jeggings sitting on the counter.
The girl looked surprised, too, and as she door swung shut, she said "Sarah? Is that you? What happened? How did you gain so much weight?"
Before she could ask how the strange girl knew her name, Sarah felt her body swell out again. The tear in the seat of her pants expanded all the way up to her waist, and all the way down between her legs. Her swelling ass forced the gap open, leaving her stretched panties clearly visible from behind. Worse, the overstretched hooks on her bra finally snapped and gave way, letting her massive boobs sag free from the once-generous, but now woefully inadequate cups. Sarah shrieked and tried, vainly, to pull her shredded blouse together to preserve her modesty.
"Did... did... Kim do this to you, Sarah?" said the girl, who suddenly smiled and giggled. "I'm really sorry, she did this to me, too."
Sarah looked at the girl, who Sarah was sure she had never met. "Who are you?" Sarah asked.
The girl smiled and giggled again. "I'm sorry, I can't help the smiling and giggling. I'm Buff... Buff... Buffy. Shit."
There was something about the girl's facial expressions that was familiar...
"Biff?" Sarah asked, incredulously.
The girl smiled and giggled, and nodded.
Just then, the bathroom door swung open, and Fat Kim strolled in.
"Ah, there you are," she said to Biff/Buffy. "Oh, and look who else is here! Two for the price of one. How lucky. You know, you girls really shouldn't be skipping class right now..."
