I understood that he was illegitimate. His father and mother were unmarried. Was his father even around at his birth?
“When Ann told her parents about the African student at school, they invited him over for dinner. Her father didn’t notice when his daughter reached out to hold the man’s hand, according to Obama’s book. Her mother thought it best not to cause a scene. As Obama would write, “My mother was that girl with the movie of beautiful black people playing in her head.”
On Feb. 2, 1961, several months after they met, Obama’s parents got married in Maui, according to divorce records. It was a Thursday. At that point, Ann was three months pregnant with Barack Obama II. Friends did not learn of the wedding until afterward. “Nobody was invited,” says Abercrombie. The motivations behind the marriage remain a mystery, even to Obama. “I never probed my mother about the details. Did they decide to get married because she was already pregnant? Or did he propose to her in the traditional, formal way?” Obama wonders. “I suppose, had she not passed away, I would have asked more.”
This is c&p from the TIME article ‘Raising Obama’. I read the article a few months ago when it came out and thought that it mentioned marriage.