I am writing a novel and the main characher is a girl with confidance issues and she feeel as if she's not pretty in this page her step mother talks to her

Melanie was brushing her hair at her vanity she had just finished applying lip gloss when her step mother walked in and said "its not helping" Melanie said "what" because she didn't quite understand what her step mother had meant "it's not helping its not going to make you any better looking your still not pretty "Melanie immediately felt sad and and a single tear fell slowly from her eye her step mom sat down next to touching her shoulder and her hair lightly "its OK sweetie not everyone can be pretty luckily I am she said admiring herself in threw mirror and when she left Melanie slowly started to cry

So is the step mother mean?any tips ?