I do not know who my father is and a woman (who also doesn't know who her father is) recently came up matching me on Ancestry.com as a close relative. She and I both uploaded our raw data to gedmatch.com.
For the Xdna we matched:
Largest segment = 196.1 cM Total of segments > 7 cM = 196.1 cM Actual.
For the autosomal DNA we matched:
Largest segment = 137.3 cM Total of segments > 7 cM = 1,786.1 cM Estimated number of generations to MRCA = 1.5
641785 SNPs used for this comparison.
We've narrowed this connection down to my father's side because I match an X on people who are related to each other, but who do not match my maternal side at all. My question is, does this indicate a half sister or could this still be an aunt? She's too young to be a grandparent.
Thanks in advance for any light with more experience with this can shed on this situation.