I call your Marg/Ramsay notebook AU and raise you Joffrey/Arya FifthElement. You walk a dark walk with me, lady.
I have no idea what that even is so ha! I will say though: Sansa x Robb AU ! of Outlander. In one world she’s married and in love with Joffrey. In the other, she’s in love with her ancestor Robb. Either way, she’s getting good dick.