You must be still fresh with the memory of The Battle of The Bastards. Ramsay is defeated at the hands of Snow and Sansa feeds him to his hound. But do you remember what he said before dying?
“I’m a part of you now!”
There have been speculations that Sansa might be pregnant with his son which might be troublesome because then House Bolton would still be alive. Also, this could mean that Sansa would become like Ramsay, fierce, unforgiving and treacherous which could be a possibility because we saw Littlefinger instigating her against Snow in the last episode and so what if she gets jealous that Winterfell acknowledges a bastard as The King in The North but not her or her own son? Trouble trouble.
Game Of Thrones 