Curt Helgenberger is Marg’s younger brother.
“Marg and I were kinda picking on each other one day, fighting and tattling on each other. He (Dad Hugh) finally had enough. He kinda blew up and said ‘Come on up here.’ And he dragged us up stairs. Gets out these boxing gloves and straps ’em on, hauls us out in the front yard. We got it on right there in the front yard. She gave me a beating too.” (A&E Biography: Don’t Call Me Marge)