Let's say they never got together in season three, during the finale. There are countless possibilities, a billion scenarios as to how Twidust would have been plausible throughout the course of "A Journey Beyond Sanity:"

Where would it have happened?
What point during the story?
How would they become a couple in that moment/situation?

Share your own ideas for how Stardust and Twilight may have become a couple in the course of the fic, or when you think it should have happened.

If there was any other perfect opportunity for them to hook up, it would have been in the Season 2 or Season 4 finale.