This was very unexpected, to say the least! Several family members ended up doing DNA tests and we found out other interesting things about our family that some will not accept, but DNA does not lie. Unfortunately, our dad died in 1988 and I wholly doubt he ever knew of our new sister. Her mother passed in 2021.
I would bet your will fill your 5th g grandmother - more and more people are doing DNA tests every day and the data base is always growing. Good luck ♥