Richard was a name that came out of the name of the kindergarten she established, MADARI - MA for Mark, DA for David, and that left RI unaccounted for, so presto RI FOR RICHARD.
SPINNING OUT A STORY. LINK WTPOTUS
Haven't you heard of the practice of creating names and children no one can find? Maybe Richard also had an unfortunate accident, easy enough to arrange - it's only on paper, no one actually dies.