Paul is not going to get a good reputation among us hobbyists if he keeps things like that a secret....Nor does he want to cheat the lass out of her clientel.
Remember, not every lass that leaves IT leaves because she was fired or told to leave. Sometimes they need a change of scenery or a change of clientel. Besides doing this protects his reputation as being an upfront and upstanding guy, which is rare in this industry....