Info. re: Oklahoma illegal adoptions, 1960's

So I don’t know how anyone can get in contact with me but I have been looking for a child that my grandmother may have had. The reason I’m saying may is because my grandmother never talked about this, but her sister told me about it. My grandmother was in a group home in the late 60’s in Shawnee Oklahoma and all my great aunts know is that she was pregnant and was taken away because foster kids were not allowed to have children. And came back and was no longer pregnant, they do believe she had the child and just was not allow to see the child. I have more details and would like help with finding my grandmothers oldest child.