The Car crash that started it all

What if you got in a car crash and your parents died but you and your older brother and little sister lived? Then you and your little sister had to go live with your parents close friends that has a son named Aiden that Lexi hates the most but what happens when they have to live in the same house together? Will they soon stop hating each other or will they not change? Will the little siblings get along or argue maybe both?