Mama Sarah was not Obama Sr.’s Mother. She was like the 3rd wife or so of Sr.’s father. Someone else in this thread figured out that if she was present at Obama Sr’s birth she would have only been about 12 years old or so.
I guess plausible, but highly doubtful.
My point was that had she been O Sr's mother, there would not have been any case where she would have stated that she witnessed Sr's birth. The birth she witnessed would have to be junior.