Dean and Sam are out with Castiel and Gabriel at a bar. Castiel wants to say something that has been on his mind but can't say it. That was until he got drunk.
All I can think is Gabe being like, "well since we are all confessing our love now."
"Came the night where he drank the liquor store" i relate on a personal level
Cas just so cooly explains it like, "oh yeah you're having my child. Just so you know." Like what? Did you just think they knew this Cas?