i once knew my sister

we don't live in montana, but my half sister does. see, my mother gave my sister up for adoption to my grandmother's cousin in 1983, i believe. it was supposed to be an open adoption, and was until grandma's cousin turned around and gave the baby up again. the twist to this story is that i remember my sister, i remember what she looks like, i remember her little voice, we played together...she was adopted from oregon to a family in bozeman montana. she was born either december 12 or december 15 in 1983. her name is annah eileen. not only do i want to find, but my mother does too. grandma cousin knows exactly where she's at, and refuses to tell my mother. visits bozeman quite often. we're sure that annah thinks that CAROL is her mother, and it is not true! carol has been married and divorced i don't know how many times, and i believe goes by the last name of huggins, and is a smoker. i am missing a part of me! i know everyone else has more reason to be looking, but i'd like to do this for my mother. it means a lot to her.