Donna kept asking him back
Charles Herbert (December 23, 1948 – October 31, 2015).
Charles Herbert was an American child actor of the 1950s and 1960s. Before reaching his teens, Herbert was renowned by a generation of moviegoers for an on-screen broody, mature style and wit that enabled him to go one-on-one with some of the biggest names in the industry, and his appearances in a handful of films in the sci-fi/horror genre garnered him immortality. In six years he appeared in twenty Hollywood features.
Charles guests in three episodes of The Donna Reed Show during Season 1: Guest in the House (Episode10); Nothing But the Truth (Episode 18); and Boys Will Be Boys (Episode 24). He returned in Season 2 in The New Mother (Episode 18).