Prompt: Let's have a thing where going God Tier has made the humans' genetic material and other bodily fluids sparkly and rainbow colored. Then let's take that thing and make it into another thing where we see the reactions of all the trolls to this. GOGOGO!

"At first you'd thought Terezi felt a little left out of this clusterfuck of a relationship, always watching you and Karkat at each others' throats and goading each other on, but you've come to realize that she doesn't mind being a little on the sidelines. Correction: she gets off on it."

In which all sixteen kids live reasonably happily ever after in the Veil. Alternately: that one AU where trolls have sex by barfing blood into buckets.

"I kind of... accidentally fantasized about Karkat while we were doing it. Which I do sometimes, not when we're messing around, just like-- uh, fuck, look, I'm--" Terezi puts a finger over your lips and you stammer to a stop. She nestles closer and sighs happily. "You too, huh?" You stare at the ceiling in bewilderment. Whatever response you were expecting, that was not it.

"Whatever nasty ideas I just gave you, go for it. I'm your kinky alien sex toy for the night or whatever," and with Terezi looming over you and Karkat's big hands on you that's suddenly a seriously, intensely possible thing. You are having a vision of the future and it involves a lot of troll junk.