Sunday Dinner by DCFTEF 
(Cookie Crumbles / Rarity, Sweetie Belle)
soap

(27/10/2017)

https://desuarchive.org/mlp/thread/31051592/#q31245636

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>Sweetie Belle gets sent home from school
>Carrying a letter for Mom & Dad to sign
>Seems she used some colorful language in a argument with Diamond Tiara
"Where did you even learn such language, young filly?"
>Sweetie does not want to answer
>She risks getting in deeper trouble by protecting the source

>Just so happens Rarity is coming by for dinner with the family tonight
>She walks in on Sweetie's scolding
>Rarity is aghast
"Sweetie, darling, a LADY does not use such vulgar language!"
>That makes Sweetie mad
>Here she is, protecting her source
>Getting in deeper trouble by not talking
>When the truth is...
"I learned it from listening to YOU! You and your friends talk like that all the time!"
>Now all eyes are on Rarity
>Not only has she been cursing like a sailor in front of her little sister
>She failed to own up to her fair share of the blame
"I think BOTH of you need to follow me to the bathroom!"
>Heads hanging low, big & little sister follow Mom to the bathroom
>Both get a mouthful of bitter soap
>Cookie's magic keeps the bath brush hovering behind their rumps
>If they gag or spit it out too soon they get a smack
>Both fillies soon have a few pink oval marks on their pale white butts
>When Mom is satisfied they are released
>Dad Hondo is just finished cooking supper
>Both girls are super cautious about their language at the dinner table
>Later that night, Sweetie Belle and Rarity swear an oath to never speak of this night again
"Not a fucking chance!"