Unless it was a marriage in name only to protect the status of the baby. She talked to her friends in Seattle about her marriage and her exciting husband even though she had already left him and was in WA to go to school. I think it was just to provide a cover story. And with the home, she could have just claimed she was unmarried—why would anyone check into it?
... This divorce decree is far from “nothing”, and another point I made on the “live” thread is that an unmarried American mother giving birth to a child on foreign soil still confers her citizenship to the child even if born to a foreigner (not sure how the age thing works in this case), but an American mother married to a foreign husband giving birth on foreign soil does NOT confer her citizenship upon said child. So, if indeed 0bama was born in Kenya, now that we know his parents were married, means ... that unless he became naturalized at some point, he may not be a US citizen at all...