What is the main conflict in The Man Without a Face by Isabelle Holland?

"The Man Without A Face," by Isabelle Holland, is the story of fourteen-year-old Charles Norstadt who lives with his family in an apartment in New York City. During summer break from school, the family moves temporarily to their summer home on a peninsula on the Atlantic Coast. Charles is not a happy youngster. His mother is always "on his case." She's critical of his behavior, his activities, his poor performance at school, and his father, her second ex-husband. His mother considers marrying his father the "biggest mistake" she ever made.