The truth was, Faye transferred all five million dollars to Isabella.
Isabella eavesdropped on Faye's phone call and found out that Faye mistakenly claimed that the woman who had a past with Lysander was dead.
But the only woman who had a past with Lysander was Thalassa!
Faye just couldn't let Lysander know about it.
Isabella threatened Faye with this, saying she would spill the beans if Faye didn't cough up the cash.
So Faye handed over the whole five million to Isabella to keep her trap shut
Over the past five years, due to this secret, Isabella kept shaking Faye down for money
This time, when Lysander asked Faye to dig up info on that woman, she immediately rang up Isabella, telling her to cook up a seemingly legit and foolproof profile and get it into the boss's office
Isabella's timing was spot on, any delay, and Lysander would have known Thalassa's real identity.