All I can attempt to add to that is...it seems the kenyan and Ruth separated after approx seven years, and that would take you to 1970/1971. Ruth arrived in Kenya in late 1964.
So, when Auma says she was twelve when the kenyan went to Hawaii that sounds reasonable.
Just what he might have told her, or if he told her anything at all, I have no idea.
I’m not even convinced he was married to Kezia.
He had an older brother - who seems to have been ‘lost’ for some reason. He might well have been Kezia’s husband.
Did anyone know the kenyan had an older brother named Yusuf?
http://www.stop-obama.org/?p=312
“...“Barack,” Roy said happily, “these are our uncles. This is Yusuf,” he said, pointing to the slightly built man with a mustache. “And this,” he said, pointing to the larger, clean-shaven man, “this is our father’s youngest brother, Sayid.” [263]
Most accounts put the kenyan in Hawaii in December 1971. She was allegedly born in 1960 (as Kezia was pregnant with her in September 1959 when the kenyan went to Hawaii for college), so the only way she would have been 12 was if and when he returned in 1972, providing she had a January birthday. Of course, an actual birthdate for Auma is not so easy to find.
There are some other Auma discrepancies. She says she introduced Obama to the home village in Kenya in 1995, but I'm pretty sure he had been there (along with her) in the 1980s (although the exact year is hard to confirm). And then she claims she went to see Barry in Chicago in 1984, yet wikipedia says he didn't start his community organizing job there until 1985. These people have a very difficult time with dates.