In all honesty, your H knows you will be there no matter what. If you indeed find out that he is slipping again, maybe time for tough love? I know you don't want to do this...you have hung on for so long. but are you happy? You don't sound it. I can only imagine the pins and needles you have walked on for years now. Time for YOU to decide that you wont take it anymore? I don't know. Only you can make that decision. Maybe you need to show DH how strong you really are. then again, do you think maybe you create the ideas that your H is still involved with ow? Seems like you read alot into his every word and action. I know it must be very hard not to???? I personally think that either Ow needs to leave town or your H needs to look for a new job. I am sure you already know this.
I don't know Deb. I just think your H is way too sure that you will put up with this FOREVER. somehow he needs to know you won't. You sound like a very lovely person with a lot to give someone who will love you like you deserve. I am sure it could be your DH. but not with OW constantly ruling your lives.