Nice, a few spelling errors but good

That was very good. Who knew Twi had it in her.

Very well written! I am impressed and I enjoyed every second of this story.
There were very few erros but this story was awesome! Please make more :p

Keep up the good work!!

Ohhhhh a SparkleShy. never seen that done before. not joking this is actually my first SparkleShy I've ever read. I liked, commented, and Faved.

i liked the story BUT the cover art suggested a angered Fluttershy(DHshy/Flutterbitch etc)shy really didnt get angered. just try to pic better art to convey the story.

"Everything You Wanted To Know About Sex And Were Too Impatient To Wait For Marriage To Ask."

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Twilight sounds too much like Rarity.
Remove some of the formal aspects and rhetorical questions from Twilight to make it sound in-character.

"Okay, let's see here." The unicorn said, raising her hooves to her head to analyse what the Pegasus had to offer. "You are... asking your dear friend for advice because you found an exotic creature in the Everfree Forest and want to know if it's safe to bring it into Ponyville!"

A wide smile swept over Twilight face, her eyes showing similar signs of enthusiasm.

"Well no." Fluttershy said simply.

"Oh." The unicorn said, defeated, but bringing her hooves to her head again. "No matter, no matter. Let's see... Oh! I got it. You're concerned that one of your animals is sick with a foreign illness, and you want to know if I have a book that can help!"

Again, the same expression of glee contorted across her face. Fluttershy was briefly considering maybe just agreeing and leaving the real announcement for another time, but a voice of reason within her said otherwise, and she forced herself to disappoint her friend once again.

"No." She uttered.

"No!" Twilight barked back in surprise. "Well to hay with this spell!"

''Do you know what this means? It means that this damn thing doesn't work!'' That was all I could think of while reading this part. I even heard Doc Brown's voice during Twi's second guess.

“Ssshh.” She cooed. “You just lie back, think of Equestria, and let old Aunt Twilight do everything… Actually, forget that last part, you just lie back, think of Equestria and let young totally-unrelated-to-you Twilight worry about everything. Well actually, try not to lie too still, I don’t wanna feel like I’m doing a corpse here- urrgh. Bad idea, definitely not the proper mood setter. I guess what I’m trying to say is…”

And this is just so totally Twilight, it's great.