whoo whoo whoo, dont do it. blood or not, family is the bonds we share not the blood we have in common. this girl is your sister regardless. she's not sendin you signals, i have a best frined that i call my twin sister. she has a boyfriend aswell, yet we're always hanging together, and we drink from each others cups, and eat off each others plates. she's even changed her clothes infront of me. she's mu sister, and i would never do anything with her, even if we arent blood, and i think u shouldnt do anyting with your sister. i think that your really horny, and are reading to much into normal family behavior