So...I've spent the past THREE. BUCKING. HOURS. trying to find a story I've read a million times.

It's a twi-dash fiction that is...somewhat mature in the beginning, but turns into a slow-burn romance. Basically, Twi and Dash get very drunk, then Twi uses a spell that ends with her pregnant and dash as the father. The two are ostracized by friends, family, and the local community until the Diarchs reveal that the spell used was NOT causing a slow declination in the unicorn populous. It ends shortly after Twi gives birth.

Does this ring a bell to anyone here, or was I the victim of a fever-dream?

It rings a bell, I've read a story like that, but I can't remember the name right now.

7790835
Might this be the one? Rainbows in thr Night Sky

Yep, that's the one. Odd though;when I searched it, it didn't pop up. Wonder why it was removed

7790849
I think it's because they were done with fimfiction, and wanted their stuff gone.