How far do liars progress to satisfy their egos?

I know a woman that is constantly bragging - I told my parents and they think she is mentally ill - like my mom says I should avoid her because somebody who tries that hard to get attention might also hurt or harm others for attention and now I wonder if her life story is fake and she never had the problems she claimed to have, she treats everything as if it is a competition and refuses to share good news or praise with others, and I don’t like her because the bible says you must live to glorify God and not yourself.
How far do liars progress to satisfy their egos?
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