Run Your Mouth by Pan 
(Granny Smith / Rainbow)

(10/04/2017)

https://desuarchive.org/mlp/thread/29817496/#q29835908

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>Rainbow Dash is not subtle
>Or tactful
>Or...
>She's a nice pony. Let's leave it at that
>The plan was to embark from Sweet Apple Acres on a day hike
>no fillies who need life advice (and a primer on personal space) tagging along
>Just AJ and Rainbow Dash
>All the Apples pitched in for dinner
>The Apple family way is to have guests not lift a hoof
>All RD had to do was play along
>Which went fine until halfway through dinner
"We're going to visit some AWESOME waterfalls not too far from here."
>Granny Smith was supportive
"It'll be nice teh make some memories without some catastrophe happening."
"Yeah, it's gonna be pretty damn cool."
>Rainbow Dash had picked up this slang from a sporting magazine
>The young Apples' mouths sprung open in shock
>Applejack had warned Rainbow Dash a few times about Granny Smith's old-school ways
>not in a while though
>maybe what's happening is her fault, AJ thought guiltily
>Granny's down-home demeanor was now replaced with emotion one might see at a sundown duel in Appleoosa
"What did ye just say?"
"Um, nothing, uh, Granny Smith."
>Rainbow Dash was well underway to winning the Equestrian hoof-tapping title
"I'm not deaf, Rainbow Dash. We don't tolerate that kinda language on the farm. Come with me if ye know what's good for ya."

>Rainbow Dash looked to the other Apples
>they motioned for her to follow Granny
>off to a corner of the dining room
"Stay here."
"What are you doing?"
"Hush. All in good time."
>Rainbow Dash could see Granny Smith digging through cabinets
>She grabbed a bar of soap and held it with just a few of her teeth
>ran it under the faucet and lathered up a good layer of suds on the surface
>She brought it to Rainbow
"Puh dis in er moeh"
"What?"
>Rainbow Dash had a good guess what Granny wanted
>Maybe she could play dumb
>Granny grabbed her muzzle and turned Rainbow's face towards her
>With some frustration (it tasted bad!) she pointed a hoof at the bar of soap in her mouth
>and pointed at Rainbow Dash's mouth
>Applejack broke the standoff, not wanting her friend to get in further trouble
>"Just put it in your mouth, Rainbow"
"Okay..." (grumble)
>She put it just barely in her mouth, like Granny did
>But Granny said that wasn't good enough
(pth!) "Get that bar up in there."
"Mu I dough wan--!"
>Slowly, yet insistently, Granny Smith jammed it where she wanted it
>Sweet Celestia it tasted awful!
"Still got a bad attitude?"
(hmph!)
>Rainbow Dash's brow was furrowed at the indignity
>And of course, the soapy taste
"Maybe you need your rump spanked too."
>Rainbow was not thinking clearly
>Brain clouded by soap suds
>That was Applejack's only explanation for what followed
"Yeh got 5 seconds to wipe that look off yer snout, missy."
"5... 4... 3..." (Rainbow Dash snorted) "2... 1..."
"That's it, looks like I gotta beat a mule outta ya."

>Granny grabbed a clean bucket and told the blue pony to spit the soap into it
>She didn't have to be told twice
>she tried to spit out all the soap from her mouth
(pth! pugh!) 
>Rainbow was less enthused about what Granny did next
>It wasn't Granny Smith's first time dragging a naughty pony over her knee
>And she suspected it wouldn't be the last
>The blue color was a change of pace
>>29836192
>Lately Granny was used to dealing with a yellow rump in this position
>A little less often, some white and orange
>But sometimes, even now, she would see bits of red and a different shade of orange from this vantage point
>And years ago they were frequent sights
>That is, aside from the red color she added to her grandfoals' coats

>Granny didn't want her dinner to get cold
>Dash's insolence was another reason Granny went straight to the crop
>This was too harsh for Apple Bloom
>Definitely an implement for a full-size filly
>Granny felt nothing else needed to be said
>She was upset, and rather than using stinging words, she stung Rainbow's rear with the riding crop
(wsshSMACK!)
>Rainbow Dash was brave
(crack!)
>Rainbow Dash was not some blankflank foal
(wsshSTING!)
>Rainbow Dash couldn't see her rump
>with each new stinger across both cheeks, resistance was harder and harder to muster
(wsshCRACK! wsshCRACK! wsshCRACK!)
>Rainbow Dash was scared
>and audibly hurting
"Oww!" (hic) "Granny I-- OW OW OW OW!"

>maybe Granny was deaf
>she sure wasn't responding to any of Dash's entreaties
>or, was--
(wsshCRACK!)
>--the flurry of whiplike, harsh smacks across her athletic backside Granny's response to Rainbow Dash?

>After a few more crop cracks, Granny Smith ended the spanking
"Back in the corner, half-pint."
>Rainbow Dash was long past disagreeing
>Even if she thought for a moment she wasn't a half-pint
>Rainbow must have looked like one, a spanked filly in the corner like she was a third of her age
>Her apparent age was done no favors when Granny Smith insisted that she put the bar of soap back into her mouth

"Sit here 'n' wait. After the polite ponies finish their supper ye can spit that out, missy."

>RD didn't take any chances
>No look other than her tear-stained face
(Ah!)
>Sitting on the floor hurt her tush all over again
>She assumed this part was non-negotiable
>>29836321
>The Apples must be used to this sort of thing
>They carried on dinner like nothing happened
>Rainbow sat and watched, shifting her weight in vain to try and find a position that didn't remind her what a naughty pony she was
>She wondered how her bottom looked from the dinner table
>Could anypony see the stripes tracing up her rear?

>Dinner passed agonizingly slow
>The other ponies talked about their days
>Rainbow Dash tried to keep her mind off her spanking by following along
>This plan back(side) fired when Apple Bloom kept talking about what a HOT, SCORCHING day it was

>Finally, Granny Smith came back to the spanked filly corner

"Alright, I reckon you suffered enough. Just don't do it again, y'hear?"
"I hear ya, Granny! Loud and clear!"
"Yer dinner might be a little cold so we can heat it up for ya."
>heat was the last thing she wanted right now
"No thanks, Granny. I'll just eat it the way it is."
"Suit yerself."

>As the two hikers got ready for bed, Applejack surveyed the damage
"Ah guess I shoulda warned ya some more."
"I shouldn't need any more warnings again from this house."
>Applejack channeled her brother
"Eeyup"

>the next day went just about as planned
>the riding crop stripes had faded, but not entirely
>Rainbow Dash was thankful they were travelling secluded trails
>every patch of shade was welcome relief from the effect the sun had on the remainder of the spank marks

"Rainbow, you say your tail is rainbow, but I think it looks red from here."
"Can it, AJ!"
"Bahahaha!"
"Does Granny Smith still spank you?"
>Applejack's eyes darted back and forth and she scrunched up her muzzle
"M-maybe."
"Start talking, 'missy.'"

The two had a lot to talk about, spankings both recent and not-so-recent, and witnessed and sadly, experienced firsthoof.

END

-----Appendix:-----

Two hot lines stolen from the comments here:
https://derpibooru.org/771266