I was watching season 1 with my friend who has never seen the show or read the books, and she asked me why Sansa and Jon Snow never had any interactions because Jon/Arya/Bran/Robb and to a lesser extent Rickon with Robb/Bran all regularly interacted with each other. Sansa only seemed to interact with Arya. I thought about if there was anything in the books going into their relationship with each other, but couldn't remember.
she has her moms same view towards jon. she even tells arya at one point "he's just a b*stard" or something like that. sometimes i feel like jon and sansa might end up married since they are just cousins since sansa never looked at jon as a brother. sansa gonna be making power moves too so she might be the most powerful female besides danarys when its all said and done. we dont see the power of the vale since they arent in the war but they seem to be a pretty powerful kingdom.
i just thought of something. since tyrion might end up coming back and being lord of the vale if his plan works out, what are the chances of him and sansa's marriage being kept together and them uniting the vale and casterly rock along with the riverlands and the north? that would be crazy and plausible since tyrion isnt a bad guy, he's cool with jon, he treated sansa well enough, and the lord of the riverlands, edmure, will be a captive at casterly rock if/when tyrion comes back.