I came out with red hair just like my daddy, no question of paternity there 
I don't have any opinion on the issue, either way.
However, it is worth remarking this is why adultery was considered "worse" if a woman did it, as compared with a man doing it, going way back to the dawn of history.
The mother of a child is easily verified, the father not so much.
Anne Boleyn, the second wife of Henry VIII, and Katherine Howard, the fifth wife of Henry VIII, were executed for "confounding the succession"--i.e., by their alleged affairs with other men while queen, they could have been impregnated by another man, bringing forth a child that was
de jure the king's, but
de facto not actually his, thus fouling up the royal bloodline.
That by the way probably happened with Catherine the Great of Russia 150 years later.
