Pulp Purees family, while never before meeting Nyx, have demonstrated acts of Self-Redemption to change their outlook on life and to change themselves and who they want to be instead of labeled by others for their mistakes and previous choices. Your Wife could have continued with your work in erasing Nyx entirely when she had regained her memories, but she had listened to Twilight Sparkle and learned exactly what kind of being Nyx really was by listening to her tale, and before that she had wanted to go and be with your children because she knew that they had changed for the better, these two acts alone changed Winter Squashs’ overall opinion of Nyx and allowed her to move on past the pain and sorrow that she had felt when you were taken away by the Children of Nightmare all those years ago and reject the kind of Mare that she was when she went through Ponyville destroying any piece of evidence leaning to Nyx’s very existence.