It does in a way make sense that no matter what the circumstance or confusion created there from, a person makes A CHOICE on how to ACT/REACT whether on a conscious or subconscious level.
This could possibly be Gauri's innate personality that she masked while in Mumbai because she could have possibly also been enamored by the big city life. Just A's how Jagya portrayed himself as suave and ultra modern in Mumbai but in essence he was always a temperamental loser so too Gauri must have done the same. It's just that we never got to see her tantrums whilst growing up post the annulment of her balvivah to J.