Robb can't bring himself to convert (Path Four)
From Create Your Own Story
"I'm sorry," Robb apologized still breathing hard "I can't just discard the gods of my ancestors. I apologize if I led you on."
Melisandre shrugs, and turns to walk away. "A shame," she says, leaving the room, "You and your sister would have made an amazing pair." Without another word, she left the room.
With that, she turned around and left the room. Robb fell back onto the bed, breathing heavily. Sansa would understand. They could never marry, it wouldn't be right. He could still keep her at his side, maybe meet in secret from time to time, fuck in the Godswood when they were alone...
Unable to do anything else, Robb just decided to go to sleep. He had achieved everything he wanted in King's Landing, and tomorrow he would finally go home.
(TurinTurambar)
