The parents are recently divorced, just before the events of Kristy and the Missing Child and mentioned again in Mary Anne Breaks the Rules. The parents are acting civilized and their children seem to be handling things well. Mrs. Kuhn has custody, but Mr. Kuhn wants joint custody with his ex-wife. Mr. Kuhn has temporarily moved to Texas in Kristy and the Missing Child. They also hosted the haunted house at the end of the book in their basement.
Harry grew up in Stoneybrook and knew Sharon Spier since they were very young. He volunteers every single year for the libraries book sale according to Rioko Kishi. He owns a green t-bird in Kristy and the Missing Child. The police thought that he was in Mexico. Jake knew that his father had a girlfriend and has been writing to him. Harry was never in Stoneybrook and in Mexico on business the entire time Jake was missing.