Could you see Dany killing Jon to take the throne?
Just the way she looked at him after he told her, like he just dashed all her hopes and dreams away with a few words. Her entire journey all this time has been to take the throne, its what was driving her, and Jon is now telling her she can't take it.
I know she comes off really nice sometimes, but theres been alot of times where shes been ruthless and murdered people when she didn't need to. I think theres more of her father in her than she wants to believe.
It wouldn't shock me if she at some point lets Jon die or kills him herself and goes full on bad guy to take the throne.