((EDITED!!!))
Your mom, Evelyn Rhodes was a well known entrepreneur...the best business woman in the whole country. She's famous for her excellent business decisions and her boss bitch attitude. Your father, Davis Winchester works for your mom and is without a doubt intimidated by her. You sometimes wonder how the two of them even ended up together.
Both your parents come from poor families. Evelyn was the first multi- millionaire and hence, she's respected by every member of the family since she gives them comfortable lives. They do everything to please her and hating you is one of them. Your father just simply acts like you don't exist.
Evelyn has despised you since birth, simply because you look exactly like her biological father. The same man who abused her mother for years. He's dead now but Evelyn still hates him. She didn't even let you use her last name.
You have never gotten any maternal love from her. All of it went to the adopted twins, Lea and Thomas. She adopted him 3 years after you were born because she didn't want to get pregnant and end up in the same situation.
The twins are a year older than you. The reason why your mother chose them is because they actually kinda look like her. You live in their shadow and they don't make it easy. They never forget to remind you that Evelyn doesn't love you and that they are the favourites among the whole family.
You've been living like that for all your life. Now you're 21 and nothing has changed for you.
Thomas and Lea on the other hand are doing better than ever. They work in Evelyn's company. Evelyn also found them suitable partners who come from noble families. Thomas got married 6 months ago and Lea is engaged.