Its like 5-6k words of unending clop... I love it!

'their hands groping each other.'
Anyway....
Enjoyable story, not really sure how i got here though.

The ending is kind of disturbing...

Good story,I find it funny how Rainbow didn't put 2 and 2 together to find out Twilight was asking about her at the flashback . Good story though This was my reaction to the finish . I loved it

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Try "bechdels law",
I am not sure it will ever update again, but one of the sex scenes is ~15,000 of nonstop clop, if I remember correctly.
it was outragious. This is a very good length. and a very good story.
Twilight, you're so devious.

Hmmm….

Now all of Twilight’s friends need to find out and add their own ‘adjustments’ to Rainbow Dash…

AJ: That’s right Rainbow, you love workin in my fields fer me allllllllllll day long for free
Fluttershy: You don’t need to join the Wonderbolts Rainbow Dash, just stay and protect me for the rest of your life
Pinkie: Okay Dashie, whenever I say pineapple, you’ll bark like a dog!
Rarity: Oh Rainbow you don’t need to fly fast and ruin that lovely mane of yours…now go try on these dresses you love to model for me.

Twilight: WHAT ARE YOU ALL DOING TO HER?

Applejack: Yeah, the pony that hypnotized her into a sex toy is getting indigent at our actions.

You know, I can kinda see a dark sequel for this thing. . . Buuuuuuuuuut I think that this is great just as it is.

*Edit* Not that I would mind getting a sequel either though

Zero-G, time travel sex, and that ending.

This was quite the tale.

~Skeeter The Lurker

That was quite funny and well done Very cute Twilight did that.

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Twilight can easily just go back and reverse all of them.

GG Twilight using Rainbow's learning style like that

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Hey! Don't you know it's all about Twilight?

HOLY SHIT. Doctor Who reference.

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It was a wild ride that I will tell to my grandchildren decades from now.

Just do the first thing that comes to find.

mind
____________________

Holy crap, scientific mind rape. Even then ... it was kinda hot. *goes to the next chapter*

Sorry to be 'That guy', but wouldn't it be that future twilight would stay, and past twilight would 'disappear' when using time travel? because it's past twilight that goes back in time, and then would become future twilight, meaning that future twilight would still be there.

4661951
Not exactly... In the show, the spell allows a pony to be sent back in time for a short duration, then come right back to when they started.
If anything, we should expect Twilight to pop back in on Dash a few seconds after the story ends.

Personally, I wouldn't mind seeing the story continue from 'Future' Twilights perspective, and see if she has any energy left for poor Dashie when she comes back.

Time has been destroyed in this fic.
Why?
Because past twi never traveled back an hour to start the whole thing like she was supposed to. Past twi goes back and future twi turns into present twi because past twi is now the future twi which has appeared for them an hour earlier.
If you need help understanding I recommend the Doctor Who episode where the TARDIS lands in itself. (look it up on YouTube, I would give a link but I'm on my phone.)

4661951
That's just what I said.
lol.

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Yeah but who casted the spell in the first place then? And what dash would she go to? She would even exist if it wasn't for past twilight being future twilight then they switch places and it keeps repeating. Watch that episode of Doctor Who I suggested to make more sense of this.
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4777149 But she did.

“Oh! That’s my cue.” Twilight extricated herself from Rainbow’s body. “I’ve got an appointment with the two of us an hour ago. I’ll see you when I get back.”
After one final kiss, Twilight’s horn flashed, and she slipped through the flow of time.

Below them, Rainbow, finding a sudden lack of pussy, craned her head to see what the matter was, then felt her jaw drop at the sight of the two Twilights making out. She could see their tongues writhing together, their hands groping each other. She could hear the wet sounds of their lips and their moans echoing into each other’s mouth. A drop of saliva fell onto her stomach. All of it was enough to send Rainbow over the edge yet again.

They don't have hands, they have hooves.

“Oh, c’mon!” Rainbow squawked from between past-Twilight’s legs. “Enough with the timey-wimey crap. This night’s already confusing enough!”

I love your Doctor Who references.

She could see their tongues writhing together, their hands groping each other.

Hands?