I dont' know. It seems to me her son had a lot more sense than she did. It was obvious to him they were trying to get a rise out of her. Why couldn't see she it? She probably did. It just pissed her off.
But the 3 stooges are not going to do it again huh? Try "joking" about a bomb in an airport.
What would you have to say, IF Eunice had kept her mouth shut and those jerks did do something ? Yes, you would have heard about it. Others knew that she had heard them and the media would have been all over her, had something blown up, in Miami on the 13th.