What are you basing your assertion that he has a son with a foreign non-African/black woman upon?
Is it Ronald Polland' book "Alias Barack Obama: A lie is born" or some other source? Is it from Martha Trowbridge's website? (a pay for viewing site now) Is it from Sharon Rondeau's website? (a pay for viewing site now)
Upon what, or according to whom, do you make your claim?
His “reputation” would have been ruined if knowledge of that illicit relationship were to have been revealed.
As is being shown on this very thread there were people who knew, beyond a doubt, of his homosexual dalliances back then and even that didn't ruin his "reputation".