1121cm across 32 segments on my biological fathers side.
She doesn't know who her father is,and has no links to me on her mother's side.
She is linked to being closely related to both my biological aunts.
My biological father has only two sisters,that have had no children.
Is it possible that she is my half sister.
My biological father was pretty irresponsible the first half of his life,ang got around so to speak.
She divorced my biological father when I was 8mo old.
I never knew him or his family.
I did speak to one of his sisters about 10yrs ago.
She knew nothing about me even though her brother was married to my mother for over a year.
He was irresponsible and drifted around a lot the first half of his life.
The lady I mentioned in my first post is the only other close relation by DNA and linked to my aunt who recently had an Ancestry DNA test.
My aunt's numbers are 1647cm across 72 segments.
1. This lady is indeed your half sister.
2. Your grandfather was as promiscuous as your father and had another child no one knew about. It this case the lady would be your half first cousin or half aunt. Based on the numbers, the latter is the most probable scenario.
In my limited experience, the relationship is usually on the far end of the range given by any calculator. So if a test says 2nd to 4th cousin, more often than not it will be a 4th cousin.