What is the main conflict in A Virtuous Woman by Kaye Gibbons?

Blinking Jack Stokes has just finished the last of the food his wife stocked up in the freezer in preparation for her death. Ruby has been dead four months, and Jack still cannot get used to being alone. Ruby knew he would not fair well alone, despite the fact that he was a bachelor for a long time before he married her. Ruby was right. Jack eats nothing but cereal now that the freezer is empty, has not washed dishes in weeks and spends a great deal of his time remembering the past.