Other than the perjury issue, I don't see the importance of the relationship beginning after the hire and not before.
Either way it was totally unprofessional and unethical. If Fani waited until after the hire to set her cap that is as bad, or worse, than her initiating the intimacy prior to the hire.
It is indefensible for a powerful boss to receive sexual favors from a subordinate. Her control of his half-million dollar salary is the very definition of boss supremacy.
As Kamala would say: “Full stop.”
Just confirm that they had separate rooms on all these trips.