Trivia: Larry Hagman ("JR") was the only actor to appear in all 357 episodes of the show.
Trivia: The "Who Shot J.R.?" shtick was so secretive that even the actors didn't know the answer.
Trivia: Even though Barbara Bel Geddes played Larry Hagman's mother in the series, she was only 9 years older than him.
Answer: No, back then such things were unheard of. Too much politics, contract disputes and what would the characters do if they met.