All these seasoned individuals were all confused by MT's apparent devotion to FD.
But that is the red herring here. She devoted to no one! She demands devotion, not the other way around!
IMO they were all banging their heads together, for it appeared that MT could divorce herself of involvement by offering up FD. And yet she wouldn't. Ergo, the question -- what's wrong with her, that she's not "getting" it. To avoid arrest, it was in her best interest (according to all present) to urb his hide to save her tail.
Only one conclusion to be drawn IMO -- MT was deeply involved and did not know how to fill in LE blanks in a way that didn't implicate herself, and aware of that, she could only re-iterate.
She couldn't weave a lie in which FD was responsible and she was not involved. And... I'm not sure it's ever dawned on her that her beloved FD did that on purpose so that she could never leave him holding the bag.
If she had ANY wits about herself, she Sofia have said the plan was to abduction JFd, shake her up, and scare her into divorcing on FD's terms, claim she was party to that but never to murder and that the murder and everything after was FD's doing. It wouldn't hold up but it would make more sense than she had no idea.
The State did a great job at trial, even without her phone, establishing how out of character it would have been for jealous, distructful, with-reason-to-distrust MT would have been if she awoke to find FD not at home at 5am in the morning...
Nope. Instead they had leftover Greek salad and lunched it up like trustful lovers. No 'where were you?', no "who were you with?"
And if FD wasn't with JFd that morning and JFd wasn't murdered, what was MT hiding from when LE arrived at 4 JC that evening? What, she had a premonition it was going to be about something from which she'd want to remove herself?
JMO