That's fine. I've just seen people work both ways. 

Actors hide their accents all the time, people looking to escape their past (or are on the run from a violent military force and don't want their actions to be traced back to innocent people back home... 😉) can work to "lose" it, and people away from home can actually lose it or pick up elements from their new locale's accent. 

I have bilingual friends whose manner of speech changes drastically when on the phone with their parents.

(It should also be noted that this my opinion on possible reasons, and should not be taken as an official statement on her actual reasoning.)