Well Dany had a brutal wedding night and came out more or less unscathed.
So once Ramsey dies, maybe Sansa will get over the trauma.
One thing GoT seems to do is really set up these villains so that the viewers really anticipate the comeuppance of these villains. They started out right away with the Lannisters, have been cultivating Ramsey for awhile and now Roose Bolton and Littlefinger.
I can see the end of the series becoming this hugely satisfying, cathartic orgy of blood as all the baddies get theirs -- Cersei, the Boltons, the Red Priestess, etc.