Unbelievable that's 22 years down the drain. He did it to himself though. p 0 r n o g r a p h y is like an addiction. I know I got that problem too. Then it leads to cybersex then he realizes his fantasies. the rest is history.
You know if he had confessed to you about his first affair, you might have been able to put a brake to it before it got worse. I believe keeping things secret is what causes a lot of problems. If you don't grow together, you grow apart.