Yeeeah. Poor Carlos :( And, I mean, no reason why one can't put that in the mouth of opera!Filippo either! He does say something like, "Yes, I loved him!" in the Lacrymosa, which there isn't necessarily implying kingdom-burning-down levels of wrongness, but it might...

(Also, TOTALLY IGNORE what I said above about not requesting the opera. I want ALL THE OPERA FIC too! :) And I think I get picky when I'm myself trying to write book canons with a distinctive voice way more than the same thing with other media.)