She? You mean Stanley Ann? There is no evidence she and the Kenyan 0bama were ever married.
If by Mrs. Obama you mean the woman he married who went to the Philippines, that’s another matter.
The 1964 divorce decree lists Stanley Ann D. Obama as Libellant vs. Barack H. Obama as Libellee. It states that they were lawfully married in Wailuku, Maui, Hawaii, on February 2, 1961. The divorce decree also lists one child born to said Libellant and Libellee, Barack Hussein Obama, II, a son, born on August 4, 1961.