I understand that you have a family and a business. Believe me!
When I found out that my H was emailing and phoning other women, as well as some porn too...I did what GEL did...I got proof so that it wasn't just my imagination..it included consulting with a private investigator, installing spyware on his computer (which unfortunately, I still monitor...trust issues on my part)among other things.
I was like GEL - I had to know!
However, neither $$, nor comfort, nor a dad for my children in the house was above my self respect.
We did have issues to work through and are working through...but for us, and we both had this agreement going into marriage...bringing other people into the marriage via photos, videos, or in reality was not deemed as acceptable.
I agree that sometimes porn is not the root...the root is that a person isn't dealing with the issues at hand.
Sometimes an "intervention" is what is needed to shake the person into reality. GEL did so.