You lost me there. How could Josh Duggar possibly be thinking that he was acting out of love while being a serial adulterer and cheating on his wife, the mother of his four little children? Never-mind exposing her to possibility of STDS which could harm his wife and her babies?
Of course there was no moral justification for his actions.
It is not uncommon for an adulterous spouse to claim love for the spouse and a desire not to end the marriage, and yet claim feeling unfulfilled in such a way that only an affair can satisfy.
By the miraculous power of rationalization, the adulterous act is transformed into a noble, selfless journey into the depths in order to preserve the sanctity of the marriage above.