ISO 1/2 sis Bmom was Dougherty

Looking for 1/2 sister born to:Margaret E Dougherty.Margaret's birthday: October 25, 1925Margaret is a twinIrish CatholicMargarets parents: JosephH Dougherty & Catherine Gleason DoughertyMargaret was born & raised in Butte, MontanaStill lives in home that has been in family for 100 + yrsBirthmothers sister inlaw told me that they know Margaret had a child (girl) before me that she gave up but the family didn't know about me.My Birth Name: Mary Loretta DoughertyBorn in Tacoma, WABirthday: July 11, 1952We had a 1/2 brothers Joseph Julian that Margaret kept. He was born April 13, 1956 in Butte Montana. He passed away Dec 26, 1999. Does this sound familer? I don't know where to start to search for you. Can anyone help. Thank you Janice Pascher jpascher@hctc.com