Originally Posted by rory
How do you know you're not just one of the many women he lies to?
Bingo. As a past cheater I can testify that I was lying to everyone involved. Don't tarnish yourself or your life with enabling someone to take the low road. If he's resourceful enough to pull off an affair, he's resourceful enough to be above board in getting his needs met.
Affairs are sometimes for the lost and desperate, but often they are just for the lazy. I agree that you could help light a fire under his ass about dealing with his relationship...but engaging in a dishonest and uncaring act is not the path I would recommend.