Perfect

 Truffles watched as her friend carefully applied makeup. Prima Donna lacked the delicate artisan's touch of her cousin, Magnolia May, preferring instead to glob on her eye shadow as thick as possible. Magnolia called it "ghoulish", while Prima herself called it "punk rock". Different strokes for different folks, Truffles supposed.

Truffles wasn't allowed to wear makeup just yet. Not that she would have attempted it anyway....With her luck, she'd probably just make a mess of things. Truffles cast a longing look at Prima's pristine, flawless face, watching as Prima examined her mane in her bedroom vanity mirror, before she picked up a mane brush to pull over her glossy, dark curls. Truffles peered into the vanity mirror from a distance away, gazing at her own dull, messy mane, and pudgy, freckled face.

Truffles knew that she wasn't beautiful, but it still hurt to be reminded. And the foals at school...they certainly had no problem reminding her. Just the other day, she'd overheard two fillies whispering under their breath as she walked past, a rather rude comparison to a certain pink farm animal...

Prima Donna's ear perked at the sound of a sniffle. She paused in her mane brushing, turning to peer at her friend. "Truffie...?"

Truffles startled, and quickly wiped a hoof across her eyes. "Sorry, Prima." She forced a teasing smile. "I, um...I think you used a little too much hair spray. You've got my eyes burnin' somethin' fierce."

Prima narrowed her eyes. Truffles was so transparent, honestly. Even now, as the earth pony fibbed about hairspray in the air somehow affecting her eyes, her ears were folding back, and Prima noticed a slump in her shoulders. "Truffles." She said sternly, "What's wrong?"

"N-nothin-" Truffles tried to feign surprise at the question. Prima hopped down off her vanity stool, stomping her way over to her friend. Truffles retreated slowly, stumbling over her own hooves and falling back on her rump. "N-nothin', Prima, h-honest-"

"I will not be lied to." Prima sniffed, holding her head up high. "I thought you were my friend, Truffie. But if you're going to sit on your tush and fib to me-"

"N-no!" Truffles' eyes went wide. "It's just....I..." Truffles dipped her head. "You're so pretty, Prima."

"Don't change the subject." Prima rolled her eyes.

"I'm not! I just meant...you're so pretty, I don't....I just don't understand why you'd wanna hang out with me."

"Truffles, you're not making sense." Annoyance was seeping into Prima's tone, and Truffles flinched. Her lower lip began to wobble, and her eyes shone. When she spoke next, it was a struggle to keep her words steady.

"You're the Prima Donna. You're just a filly, and already you're a star singer, and model, and all sorts of stuff. You're special, and gorgeous, and I'm...not." Despite herself, Truffles began to cry. "...I'm ugly, Donnie."

There was a pause between the two fillies.

"...Excusez-moi?" Prima Donna slicked back her ears, indignant. "Pardon? Did I just hear what I think I did? Did you just dare to call yourself ugly in my presence, Truffles?"

"I-"

"No. You shut up." Prima leapt forward, grabbing Truffle's chubby cheeks in her hooves. "You listen to me now, dummy. You are not ugly, Truffles. You are perfect, and you are precious."

"I'm n-not." Truffles sniffled, looking away. "I'm f-fat-"

"You dare argue with the Prima Donna?" Prima glared, squishing her friend's face harder. "Yes, Truffles. You are fat. You are fat, and your butt looks like a big muffin sometimes. It's honestly sort of adorable. But my point stands." She wiped at Truffles' eyes with a gentle hoof, but her tone was still severe. "You are perfect. I hang out with you because you're my best friend, and I love you. I love your terrible baking and your freckles and your funny laugh and your muffin butt. You're absolutely perfect the way you are."

"Prima-"

"Oh, I may be pretty." Prima interrupted. "I might have a gorgeous singing voice, and impeccable taste in fashion, and fabulous hair that Magnolia is totally jealous of, even if she won't admit it. But you, Truffie-" Prima squished Truffles' cheeks, and pressed an obnoxious kiss to her muzzle. "You are beautiful. Inside and out."

"Donnie..." Truffles trailed off, stunned.Tenderly, Prima wiped away the last of her tears.

"I, Prima Donna, have spoken. And my word is law." Prima smiled. "Now, if you're done with the waterworks, we can-"

Prima was cut off when Truffles suddenly snatched her up in a crushing hug. The smaller filly struggled, trying to protect what had been hours of hard work on her hair and make-up, but Truffles only crushed her tighter, snuggling her close and making odd, happy little noises that Prima could only conclude were of gratitude.

"...Pfft." Prima sighed, resigning herself to the hug. "And they call me over-dramatic."

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yo so remember this:

well I waffled on revealing Sweetie's Belle's kid cuz I didn't know how
i eventually decided screw it, so here you go

this is Prima Donna, she is a child musical prodigy and superstar, and apparently kind of a hardcore friend

normally I'd leave you all to speculate on the identity of her dad but it's not supposed to be a big shocking reveal or anything. It's Rumble. Y'know, Thunderlane's little brother. Music star Sweetie Belle married sweet weather worker Rumble. This means Prima Donna is cousins to both Magnolia May and Zipperflash

i drew this to cheer myself up, didn't really work haha

also i made Truffles even chubbier cuz yeah