After a while when the bomb fell silent, Wilbur had lost his sanity, he had become crazy and impulsive and his way of showing affection and love was very terrifying, he was very manipulative due to time in isolation, but he was willing to do anything to keep you safe over time. Food was scarce and Wilbur had taken the "amazing idea" of feeding you human corpses or killing them without remorse, doing whatever it took to survive and always be together until the end of the world.