Based on a fantastic recent picture by PussPuss on derpibooru #1480936

And a second great picture by lunarmarshmallow #1497895

Chapter 2 - Rainbow's Rough Afternoon

Rainbow Dash came to a skidding halt as she swooped from the skies and landed with her usual spectacular flourish. Without even taking half a moment to compose herself, she wrenched open the door to the local apothecary's store.

The jingle of the door chime was quickly left behind as she strode down the main potion aisle. As she passed a teenage colt stocking the mane growth potion shelf, her body betrayed her again. Her tail swept out and playfully whipped the stockboy, causing him to turn and see the rapidly departing pegasus's taut rear end. For his troubles, he was treated to a wink from her nether regions and he couldn't help but blush, enraptured by the lovely vanilla like smell wafting away from him. Rainbow tried to cover her face with one of her wings as she muttered to herself "soooo embarassing, so not cool."

She strode quickly up to the apothecary's counter, slamming her hoof down to get Herbal Precipitate's attention. Herbal looked up immediately from the mixture she was working on and came over to the counter with a bright smile on her face.

"Why hello there Rainbow Dash! How are you doing today? What can I get for you... some muscle relaxants, or more pseudo-protein supplements?"

Rainbow sighed loudly. "What can you get me? Are you serious? Can't you smell 'what you can get me' ?" Dash said, referring to the unmistakable estrus smell that swam about her like a thick fog.

"The old snorter has always been a bit weak since I mixed up some ammonia with chlorine as a filly, but..." Herbal took in a deep breath through her nostrils, and looked up at Rainbow. "Already? That must be a Ponyville record! Why, I wasn't expecting anypony to be entering their cycle until two weeks from now, earliest!"

Rainbow groaned. "Yeah, yeah. Rainbow Dash is fastest at everything... can you just get me a refill on Moon Tea so I can cool off? My body's going nuts over here." Dash said, as she felt her tail flick back and forth, uncontrollably.

"Yes, we'd had advance warning from the arcane society that this would be a particularly rough estrus season... something to do with the alignment of the stars, though that's out of my field of study..." Herbal cut herself short as she realized that Rainbow Dash was dancing on her hooves like a filly who really needed to go to the bathroom.

"I do have some bad news for you though, Ms. Dash. I'm afraid I sold our last palette of Moon Tea from last season to Twilight Sparkle yesterday. She always likes to have a large stock just in case. So organized, that mare..." Herbal chuckled while rolling her eyes, only the most oversexed mares would ever need a whole pallet of Moon Tea for a single estrus.

Rainbow eyes went as wide as saucers and her wings bristled out in anger. "WHAT!? No moon tea!? Aren't you required to have some on hand at all time!? Isn't that like, the law, or something?" Dash said, her annoyance starting to morph into a little fear and panic. Dash hadn't had to go through a full strength estrus/heat since she was a school-age filly and the week and a half of cold showers, ice baths, and refraining from self-pleasure (it only made it worse) was not her current idea of fun.

"Actually, no. I do always try to keep a hearty stock on hand, and I have a full batch brewing up in the back right now..." Herbal said, chewing her cheek.

"Yes? And!?" Dash panted.

"And it should be done by tomorrow evening, well before even the earliest heat sufferers start coming in... except you of course! Herbal finished with a smile.

Dash groaned loudly as she felt her body shiver and sweat. "Well, what the heck am I supposed to do until tomorrow then?" Dash exclaimed.

"Well... Pepper Shake there is a bit young, but they do say the younger colts have plenty of stamina..." Herbal chuckled, nodding toward the stockboy in the main aisle who had drifted closer to the conversation. Rainbow craned over her shoulder to look back at him, and had to give her head a shake as she actually considered dragging the colt out behind the shop for a hearty rutting. Just the though caused her to flick her tail and wink at the teenage colt once again. Angrily, Rainbow turned back to Herbal with a frown on her face.

"HERBAL! I'm serious here!" Dash shouted.

Herbal laughed again "Sorry, sorry! Couldn't help myself. He's got such a love-struck face on right now... poor colt. If you really can't wait until tomorrow, Zecora or Fluttershy should have some available for sale."

"Sheesh, thank you." Dash said.

Unable to help herself, Herbal covered her giggling snout and gestured behind Rainbow. "Pepper does get a coffee break in ten minutes though, and he seems to be... 'up' for it." She pointed with her hoof at the young teen colt. Pepper's slender but long cock had fallen from its sheath as he tried vainly to control it. Within a moment it was bouncing against his upper belly, ramrod stiff as his nostrils continued to inhale Rainbow's 'fuck-me-silly' scent invitation.

Rainbow turned and couldn't take her eyes from the colt's hard penis. Her mouth fell open slightly and she felt a little bit of drool pooling in her muzzle, forcing her to swallow. She was imagining taking the young colt through his paces, teaching him how to mount a mare and feeling that long, mottled pink shaft slide into her marehood and spurt in-

Rainbow's fantasy was cut short as she heard an embarrassingly loud 'squelch' followed by an even louder 'splorch'. A good half-cup of her juice splattered to the floor of the apothecary, and she squeaked as she realized that both Pepper and Herbal were fully aware that she had just wet herself with a particularly juicy wink.

"Eep! Thanks Herbal, gottagobye!" Dash said. Breaking store policy and blasting out of the store as fast as she could manage without knocking all the merchandise from the shelf.

A long pregnant pause hung in the air of the apothecary as Pepper looked out at the swinging door.

The pause was interrupted as Herbal picked up the intercom mic and said, in as flat a tone as she could manage, "Cleanup, main aisle... cleanup, main aisle... mop and bucket required." Before she burst out laughing.

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Rainbow flew high above Ponyville, trying to get as far away from downtown as possible. Up here in the high clouds, far away from any stallion, the air chilled her burning loins as it flowed around her body.

She knew that Zecora was away at the moment, visiting her family back in Zebrica, so her trajectory was taking her right to Fluttershy's quaint little cottage.

As was her wont, Rainbow didn't bother with knocking or slowing, and exploded into the cottage before opening her wings and coming to a screeching stop.

"Fluttershy!? You here Flutters?" She called out, looking around the somewhat empty cottage.

"Great. Just Great! She's not here... what am I supposed to do now? I'm so royally screw-... hello, what have we here?" Rainbow cut her own whining session off as she noticed an open medicine bag in the center of the room. She trotted over to it, carefully reading the label on the side of the bag in what was clearly Fluttershy's handwriting.

ESTRUS POTIONS

Rainbow Dash did a backflip in excitement"Awesome! Right where I could find it and everything! Fluttershy must have had her heat hit early too!" She reached in to grab a bottle, not paying particular attention to that fact that these potion bottles did not have crescent moons on them, but radiant suns. She was lifting a bottle from the chest when she noticed her hoof had a white bunny attached to it.

"Angel? Look Fluttershy would understand, I'll pay her back right away, I need this!" Still the little bunny wrenched backward, trying to pry the potion from her hoof as he pointed wildly toward the label on the bottle.

Rainbow's dogged determination to quench her lust had her in tunnel vision however. She needed this bottle, and she wasn't even considering that it could be anything else but moon tea, the cure to all her troubles. "Leggo you pesky, little, furball eating, ugly... rodent!" As she spat out the last word, Angel bunny seemed to have had enough. Dash was surprised at how he suddenly stopped caring and easily let her have the potion bottle. He watched with his arms crossed and a smug look on his face as she uncorked the top.

Rainbow cheered in success, "thank you dude! You have no idea how bad I need this right now... I've never had heat this bad in ages... screw the recommended dose, I'm taking the whole bottle." She began chugging the entire bottle down. In past estrus seasons she'd sometimes taken half a bottle... today she knew she needed the whole thing.

Barely bothering to notice that the thick fluid had a strange sickly sweet taste and seemed to warm her stomach, instead of the bitter and cooling effect that moon tea usually had, Rainbow finished the bottle off with a loud sigh of relief.

"Aaaah! That's how you spell RELIEF." Rainbow chuckled as she placed the empty bottle on Fluttershy's coffee table. "I'm feeling better already! Now I've gotta run Angel, I left my folks back at my place alone, so if you can let Flutters know I owe her one, I'll drop by later to pay her back..." Rainbow felt her body clench and gurgle strangely but shrugged it off - probably the moon tea just starting to take effect. "And pick up some more moon tea, too!"

Rainbow spread her wings and blasted out of the front door of the cottage. Heading for home.

Just moments later, Fluttershy walked in holding Harry the bear's paw in hers.

"Don't worry, Harry! Its very normal to be nervous your first time with a new sow. But I'm so glad that you and Bertha have hit it off!" Fluttershy squee'd delightedly. "In fact, I was hoping for things to have gone well, so I took the liberty of taking my industrial strength bear estrus inducer out of storage to help Bertha get in the 'mood' so we can have lots of little Harrys and Berthas running around by next spring!" Harry blushed as Fluttershy trotted over to the table with the open medicine bag laid out.

"That's strange! There's an empty bottle already here... I don't remember using any of this stuff since I ordered it last fall when you were seeing Bella." She carefully inspected and replaced the empty bottle into the kit. "You have to be very careful with this stuff Harry. Its a controlled substance for a reason, you know! Only a tablespoon at a time, at most for creatures Bertha's size! Anything more and... who knows what might happen!"

Angel bunny, sitting back in a corner with a shit-eating grin thought to himself - Who's a rodent now you horny pegasus slut?

Author's Note

Wow, I can't seem to stop writing this story! I promise we get to the Anon scene and finale next chapter, which I will try to get up soon (maybe today even!)

Let me know how you've liked!

Comments and messages thus far have all been very positive!