The crown is crushing him, she thought. He wants so much to be a good king, to be brave and honorable and clever, but the weight is too much for a boy to bear.
If you are still taking prompts I would like to see one where Sansa over hears a conversation between Jon and Davos or Tormund where Jon confesses that he believes Sansa will betray him eventually in order to become Queen of the North. But that he isn't worried about that because the others are coming. He says that if he lives to see the end of the war, he'll disappear. Letting Sansa play the game of thrones with the south. That night, Sansa confronts Jon - upto you how that confrontation goes!