DUDE, THAT TOTALLY REMINDS ME OF WHEN I ALMOST GOT SOMEONE TO WRITE SAM/DEAN MPREG WHERE SAM GOT PREGNANT WITH CASTIEL. Because, you know, when they fall their Grace, like, does it's magic and Anna was totally actually born to a couple.

So Castiel could totally fall and Sam could totally get pregnant with his and Dean's own little angel to gestate and keep safe.

...It was even crackier than it sounds right here.