First... by all means.

Not bad to say the least, but overall it's interesting to say the least.

(clop)(clop)(clop).....

To give her all of this, I want you to take that respect from me. If you see me, and your cock twitches, do not be afraid to mount me, for I will adore every single time it happens, because while she is a queen, I am only a lowly slut, who deserves nothing more than to be fucked over and over again.

...

Perfect ending.

soooo normal sized rarity is having a dick larger than what would be normal for celestia here -.o?....

I'm sure Equestria will now be beautiful forever

I do hope that there is a sequel to this story.