It must be very hard for you to know that your DH had this inappropriate relationship (even if there was no sex) but that he still sees that person every day. Normally you would tell him to cut off all contact w/ her. And it would be difficult for him to fire her cause maybe then she would claim sexual harrassment since he was the boss. Is there any chance that he could take a job somewhere else? I know the economy is bad so that might not be an option but it would probably be best for your relationship if they were separated. But then again, if he wants to have an EA or PA he is going to do it even if they don't work together. Has he give you reasons to be suspicious, like are there late nights at the office, a lot of texting going on, or taking the phone into another room to talk? Sometimes your gut feeling turns out to be right. I would suggest that you go to a counselor because I think at some point you either have to decide to trust him or end the marriage--your marriage is not going to work out if you are constantly suspicious & telling him that--by then he might feel somehow justified in having an affair since you're accusing him of it anyway.