Do you have any evidence of any nature that is the case?
If you can't come up with some off the cuff, the way you locate it is go to the local library and find copies of the December 1960 and January and February 1961 copies of the local Hawaii newspapers; locate the Vital Statistics pages; and look for a marriage in any form of Barrack H. Obama and Stanley Ann Dunham.
Meanwhile, I am looking in Mombasa and Nairobi and bet I find a record before you do! Best of Luck.
Do you have any evidence of any nature that is NOT the case?