Looking for half-sister

Johnston IA

Description

I was told I have a 1/2 sister in Kansas City area. Our Father was Henry(Hank) Edward Walden, from Michigan. I was born in 1963, and she was born a couple of years later. Her mother sent a picture of a baby girl to my uncle Joe Pluff and aunt Heddy Walden Briggs, in Michigan. They didn't keep the letters or the picture, I no idea what her mother's name. I just found out about her, so I’m just trying to find her. Update, found out her first and middle names might be the same as mine, Mary Ellen. Not sure if she was given the Walden last name or not?