Good question-math is math and Gladys died at 46.
A couple of songs have stated Elvis and Gladys both dying at 42 and many newscasters over the years have mistated the myth that they both died at 42 so perhaps she has just always accepted it.
My dad commited suicide when I was 5-and I am sorry to say I am not really sure of the age he was when he died-I think 29.
My grandparents I know were in their 70s-but exact age I would have to look it up. Funny how some things are so easy to recall and others slip from the mind.