Or Stanley Dunham with an "acquaintance" of FMD doing a stand-in as the "baby momma"... oops. But, Dunham always wanted a son...
Grandpa Dunham probably paid the Kenyan college student to claim paternity to give cover to their good friend and fellow progressive socialist Frank M. Davis. Mr. Davis told of his preference for sex with young teenagers, both male and female in his writings.
Years later Barack Obama referred to Frank Marshall Davis as a "father" figure while growing up. Considering the kind of person Frank Marshall Davis was, it is possible he had sex with both the mother and the son.