> I am scared and this close to setting up a secret passphrase in case they need to tell me apart from a clone.

I have done this already and convinced a friend to do it after her father fell victim to a scam where he was convinced the sheriffs department wanted him to pay off a fine in gift cards.

I am also concerned that one might steal a trove of texts from someone and plug it into AI which could mimic the writing and tone of someone.