10% of people have the paternal DNA of someone other than their legal “father”.
Are they sordid liars?
Most are unaware of the situation, as the relevant act was some 9 months before they were born.
So while it may make his mother look like a sordid liar (and a slut), it wouldn’t do much to him; and it certainly wouldn’t be the grounds for any legal action.
Otherwise there are millions of birth certificates out there than need amending!
Uh, Obama claimed to have had an old copy of his birth certificate in his own book. If it says anyone other than Hussein Sr. is the father, then he’ll be shown as the sordid liar that he is.