We knew that the first meeting between the Mother of Dragons and the Lady of Winterfell for years was bound to be interesting, to say the least. Daenerys has come to expect deference from everyone she meets, while Sansa has long since had her fill of self-appointed monarchs demanding her subservience. Complicating the matter is Dany's obvious desire to win the approval of Jon's family, which she botches right off the bat by complimenting Sansa's beauty. You'd think that after years of suppressing her own eyerolls while other leaders focussed on her looks, Dany would know better.
In response, Sansa gives the Khaleesi a visual dressing-down so devastating it would make Cersei Lannister blush. She does still welcome Dany to Winterfell, albeit a bit frostily, but makes it clear that while Jon may have bent the knee, Sansa is far from eager to hand over the power she's worked so hard to amass for herself.
Despite the distinct lack of warm fuzzies in this scene, it was extremely satisfying to watch Sansa refuse to bend after so many years spent watching others attempt to break her. And while we love Dany, it's about time someone stood up to her that she couldn't just hurl her dragons at and call it a day.