Does anyone remember the name of the story in which Twilight inadvertently seduces and enters a relationship with both Celestia and Luna, causing the sisters to start fighting over Twilight to the point of almost starting a war?

I remember that the author gave it multiple endings too. One where Twilight ends up with Luna, one where she ends up with Celestia, one with both of them and a last one where Twilight walks away.

I can't remember the name of it and would like to read it again.

Could be Stuck In The Middle by Bigwig6666.