It doesn't make any sense though. Cersei was at least mentored by tywin for forever. Sansa spent her days knitting, and then getting tortured. She's no mastermind, and we can see that as she undermines Jon in front of all the northmen, and appears to trust the man who helped kill her father more than Arya. And sending briene away, because Arya needs protection...

I think she's gonna screw everything up, because there's no such thing as happily ever after. Hers is the story of make believe, and I think she's going to get continually punished for it. Much like theon will never be redeemed.