Image imported from derpibooru 
Original Description:
 
“Hmm, this is so good! Luna, how did you convince Pinkie Pie to make this cake again?” Principal Celestia asked through her mouth full of cake.  
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Vice Principal Luna took a moment to swallow before answering. “Simple. I just told her it was an extra credit end-of-the-school-year assignment. That’s usually a good way to get students to do what you want,” she smirked.  
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The three ladies laughed as they continued to spoil themselves in the secrecy of the home economics classroom. Hidden away from the newly-implemented dietary restrictions that’s been placed by the district, thanks to a spike in overweight students, it seemed that certain staff members have had difficulties adjusting.  
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And with the way they’ve been plumping up, it’s been getting even harder to hide it.  
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“I know these new diet plans aren’t exactly… satisfying,” Cadance said as she stuffed another piece of cake into her mouth, “But don’t you think this might be a bit risky? I mean, what if we get caught? Shouldn’t we be setting a good example for the students?”  
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“There’s nothing to worry about,” Celestia remarked. “We’ll just finish up this half of the cake and leave before anyone gets too suspicious.”  
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“Besides, there’s hardly anyone around during this time,” Luna teased as she sneaked a piece from her sister’s plate.  
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Suddenly, with a FLASH of light and a CLICK of a camera, they knew had a whole new problem to worry about.  
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Cadance - 160 lbs  
Celestia - 165 lbs  
Luna - 170 lbs  
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Please note, I added an extra outline on Luna. It’s not much, but I thought it needed that detail.