I don't think Sansa is feeling jealousy toward Jon at this moment. She's happy to be home, but now realizes Littlefinger is a problem that isn't going away. Personally I think Sansa will hire the newly minted assassin Arya Stark of Winterfell to murder Littlefinger, as there is no way any other killer would get close enough. Baelysh is crazy, and Sansa isn't sure how long she can hold him at bay.
I've watched carefully several times, and Lyanna says to Ned, "His name is Aemon.....(something). If Robert finds out he'll kill him. You know he will. You have to protect him. Promise me, Ned. Promise me." Obviously the missing last name is important. If Rhaegar married her, that makes Jon a Targaryn. Otherwise he's still a bastard, of the wrong Stark.
We've thinned out the herd nicely this season, and I'm ready for Dany and her fleet to arrive. Will they land in Dorne? Dragonstone? Or straight to whatever remains of King's Landing after Cersei finishes her reign of terror. With only 14 hours left, it's time all the pieces were on the board. Winter has come.