Perhaps More Than Any Fictional Character That I Can Remember Off The Top Of My Head - Tumblr Posts

From time to time, I come across these snippets of GoT on my social media. So on another episode of how D&D tried to push over Sansa as this "righteous and smartest" character, despite being power-hungry and wanting the crown only for herself:
a) In this scene, people who don't or can't fight hide safely in the crypts. While talking with Tyrion, Sansa decides to bring up Daenerys into conversation for no reason at all, which is followed by trying to talk sh*t about her. Then Missandei corrects Sansa.
b) In this scene, Missandei states facts as usual.
c) In this scene, Daenerys is again proven to be a good and caring person who helps others. "We'd all be dead already": Missandei would have died in slavery if not for Daenerys taking her into her care and freeing her. Tyrion would have drunk himself to death/would have died in slavery/would have been killed in Essos if not for Daenerys taking him into her service. The North, without Daenerys, would have no chance to stand against the Others; they all would be dead (including Sansa).
d) In this scene, Sansa says, "Divided loyalties would have become a problem." What "divided" loyalties? Prior to the dialogue that is shown here, Tyrion and Sansa were talking about their marriage. It's understandable that Sansa would want Tyrion to stay loyal to her, i.e., that Tyrion would have no other lovers. But Daenerys wasn't Tyrion's lover, and it's quite clear that none of them had any romantic feelings for each other. From the political side, Tyrion has sworn his loyalty to Daenerys and is one of her advisors. Jon Snow, who's the King, is at the top of the political hierarchy in the North (above Sansa too), bent the knee to Daenerys. This makes Daenerys Queen of the North. And the North and its people become Daenerys' subjects; this includes Sansa too. In no way is Sansa above Daenerys in the political hierarchy. In no way is Sansa equal to Daenerys in the political hierarchy. Sansa is below Daenerys in the political hierarchy.
So what "divided" loyalties is Sansa speaking about as if she's in an equal position with Daenerys? That Tyrion being a loyal advisor to Daenerys and a loyal husband to Sansa wouldn't go well with Sansa's desire to have the crown and rule over an "independent" North?