However, it's important to clarify a few details:
* It's not the son who burns down the house. It's the elderly butler, Stevens, who is the protagonist of the story.
* The reason for the fire is not to hide the deceased mother's weight. Stevens's employer, Miss Kenton, has passed away, and the house is no longer needed. The fire is a symbolic act of closure and letting go.
The movie is a powerful drama based on the novel by Kazuo Ishiguro, exploring themes of duty, regret, and lost love. The fire scene is a poignant moment in the film, representing Stevens's decision to move on from the past.