Nah, male giants grow more and more retarded the older they get. So it's doubtful the guy has any concept of what impotent is.would be a funny plot twist to find out the chief was impotent so hes already aware she been cheating. kinda of the like the reverse of jenny being infertile.
From that point of view it's strange that the chief is the oldest male. Logically females should have long since usurped leadership or the youngest male rules with a strict age limit.
Or .... the oldest male is chosen precisely because he is the dumbest and it is actually the chiefs wife that makes all the decisions from the shadows.