Most likely, Mayra will develop heart-related problems when she grows older. Most heart problems, especially high blood-pressure, are hereditary, meaning that she will most likely develop a form of these problems at some point in her life. She is also much more likely to have a heart attack in her life.
I don’t really know what book your talking about but maybe the mirror represents, how other people se the character, or how they see themselves.
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I can’t -wait- to receive your letter in the -mail-