Wow Corrie...to me this is a completely non-related analogy...why? Because the trust my employer places in me is a non-romantic one. It is not an intimate one. Yes, there are conditions to my employement. However there are conditions in the vows I took in my marriage as well.
Yes, my employer places a trust in me. But it's not a romantic/emotionally invested one. Yes, I could be fired if my employer chose to,and yes my H would have a right to be pissed at me...but he wouldn't be pissed at me for getting emotionally involved with someone else, he would be pissed at me because I broke a rule I knew about. Just as I was pissed at him and hurt by his actions....that he knew were wrong. In my situation though the fact is I do my work...I always hit my deadlines and because of that I'm allowed certain priviledges when I have the time..this is one of them. If there were a policy that says "no personal internet access during work-hours", then I would have to abide by that or face the consequences, that would be a boundary my employer would have. As it stands, for me anyway, what I do on here from the office is not an abuse of their policies. But that's my individual situation and answer to your question.
However...when one takes marriage vows you vow to keep yourself for that one person only, that's generally why we marry right? That for me is where the moral difference comes in. That for me is where stepping out of the marriage romantically crosses the line morally. Because THEN you are no longer keeping yourself for your spouse alone. So many people who become involved in EA's spend their time fantasizing about that other person (I know my dad does and the woman he is emotionally involved with...doesn't even know it.) They share their intimate hopes/dreams/emotions with them quite often...and don't share those things with their spouse. They spend their time expending energy on someone else...rather than investing it in their marriage to fix whatever issue it is that prompts them to seek whatever it is they receive from the other person.
That's just my take on it though...any other perspectives?