The Sandcastle

I’m going to retell the novel “Sandcastle”, which was written by Iris Murdoch. The main characters of the novel are Bill Mor, Nan Mor, Felicity Mor, Donald Mor, Rain Carter and Demoyte (former headmaster).
Bill Mor was a middle-aged History and Latin teacher at a public school. He was married to Nan and had two children, Donald and Felicity. Mor had political ambitions to stand as a candidate for the Labour party, although his wife was firmly opposed to any such ambitions. At a friends' dinner he made the acquaintance of Rain Carter, a young artist who had arrived at the school to paint a portrait of Demoyte, the school's former headmaster. Mor showed Rain Carter around the town. They were spotted together by Mor's friend Tim Burke, who suspected Mor and Carter might have had an affair. On one outing, Mor wanted to show Miss Carter a small river outside the town. Miss Carter let Mor, who didn’t have a licence, drive her car through rough terrain, but the car got stuck and damaged. Mor got home late from this misadventure, but chose not to tell his wife about the incident. Nan and Felicity went away for a holiday in Dorset, and the love affair between Mor and Rain Carter developed during this time. Nan came home early from her holiday and surprised Mor kneeling in front of Rain with his head in her lap. In despair Nan went to Tim Burke. After a moment of mutual attraction between the two, Burke advised Nan to go back to her husband and not to ruin their relationship. However, Bill found himself incapable of letting go of Rain. He was taken by her to an exhibition of her works in London and was deeply impressed with the pictures. Meanwhile, Mor's son Don climbed the school tower with a friend and was saved from a dangerous fall by his father, upon which Don was expelled from the school. He ran away from home and was missing for days. During his absence there was a function at the school for the unveiling of the new portrait. Nan gave a public speech at this