Assuming, as I do, that you are right as to marriage #2 being at St. Monica's, I stand corrected. Now a question may still exist as to whether her first marriage was annulled without which there should never have been a marriage at St. Monica's. That the marriage was contracted in a Catholic Church ceremony suggests that her first marriage must have been annulled.
Therefore, if there was no annulment of marriage #2, Rudy is indeed living openly and notoriously in mortal sin. There, I said it. Of course, it is also gruesome that Rudy and Hanover married on April 15. What an awful anniversary!
Whose annulment was in 1983 (Rudy, Hanover, both?) and, given that the Church does not report annulments publicly, how do you know? Has Rudy or Hanover made an annulment or annulments public?
No offense intended, none taken. I appreciate your scruples.