Genetic analysis shows that President Warren G. Harding ... fathered a child out of wedlock, with long-rumored mistress Nan Britton, according to AncestryDNA, a DNA-testing division of Ancestry.com.

Britton set off a Jazz Age sex scandal when she went public with her tale of forbidden love in the White House, boldly publishing her story in a 1927 best-selling memoir, "The President's Daughter." But historians long questioned her claims, and Harding defenders vilified her as a liar for nearly 90 years.

Based on DNA from Britton's grandson and descendants of Harding, the results are 99.9 percent certain, Ancestry.com said. The findings were first reported Thursday by The New York Times.


                     
The child born of their union, Elizabeth Ann Blaesing, was the only known offspring of the 29th president. She died in 2005. Britton died in 1991.