Looking for a harlequin

Hey hey I'm looking for a harlequin about a girl who had a tough life back in high school and her mother was working there so they ended up firing her mother and expelling her. All because the brother (ML)of her best friend thinks she is a bad influence on his sister when he saw them in a party long time ago when they were 17 yo. And the girl had to work in a prostitute magazine to earn money to treat her mother. And the ML hated her even more thinking she has a bad reputation and years later he was so against her attending his sister's wedding. I've been looking for it non stop but couldn't find it, I don't remember any names