For this sin would be as a secret but consuming fire, wasting my estate and reputation, and body and soul too, provoking God and enraging the husband, and bringing down some extraordinary vengeance upon me; and therefore the fear of God kept me from this and such-like wickedness. All mine increase, i.e. all my estate: compare Proverbs 6:27.
Related Commentaries of Job 31:12
Job 31:12
12 For it is a fire that consumeth to destruction, and would root out all mine increase.