The Secret Man

I find a certain ambiguity within the resolution that the Husband attains in the last paragraph of "The Secret Woman".  Her actions clearly depict a cheating wife that is defying the loyalty of marriage.  Yet the husband wasn't "rushing forward and forcing the two mouths apart".  He saw this as an answer to his confusion.  I believe that he finally understands that her actions were not directed toward cheating, yet more in a joyful and playful manner.  At this moment he could either be turning the blind eye toward her cruel acts and finding the closest excuse for an excuse, yet he is convinced that her acts are merely playful with no malice intended.  I am curious as to whether his claim of no longer fearing her actions is true.  Has he lost hope? Or has he drawn a further conclusion to his curiosity of his wife's actions.