Excuse me but Obama Sr was her SON so of course she would be there. That makes no sense. I just reread what was written.
He wasn’t her son. You are thinking in Christian terms.
The grandmother in question was Sr’s father’s THIRD WIFE. Sr was born from the SECOND wife. So Obama’s “grandmother” (or Sr’s stepmother, 2nd mother, whatever) did WITNESS Sr’s birth. The birth by her sister wife