Sam discovers fanfiction about them. Or more accurately, about Dean and Cas. Unfortunately, Dean finds out. Then Cas. And those two find
pornstories of Sam… and someone else. Then that someone else finds out.
“I’ve also just discovered that you are carrying my child and I’m curious as to how they intend you to give birth-”
– Cas to Dean
So yeah, that’s said.
Fourth Wall by entanglednow folks! Ridiculous and sometimes fluffy.