How the episode should have ended:
Ramsay tells Sansa to take off her clothes. She turns around and begins undoing the sleeves of her dress. With her back turned she withdraws the dagger she had hidden somewhere in her wedding dress. She then turns around and stabs Ramsay multiple times until he falls to the ground greatly wounded, but still alive. As he lays on the floor covered in his own blood terrified for once in his life Sansa tells him the same thing she told Myranda earlier in the episode: “I am Sansa Stark of Winterfell. This is my home. And you can’t frighten me.” She stabs him again, killing him.