Jon’s always belonged to Robb, in any way Robb would have him, since they were barely more than babes and he was called Robb’s Shadow more than he was called his own name. He’s been Robb’s and Robb has almost been his and that’s just the way things have always been.
I watched Eternals and wanted more Richard Madden and suddenly I’m reading GoT incest fic – and this one is simply amazing, even for someone like me with little knowledge of canon.