Little girl goes to live with relatives she's hardly met before,for a year,and at first,they don't get along too well,but eventually they develop a close familial bond

A story about two little girls,named Carol Anne and Melissa,who are related to each other as cousins,but hardly know each other,until Carol Anne goes to live with Melissa and her relatives for a whole year.At first,they don't get along too well,but they soon get to know each other real well,as they share a room,toys,and even clothes with each other,they end up growing a close bond that is usually reserved for best friends,even sisters.