Should I just bury it?

Well, the word from the HR manager is that I do need a doctor's note so I'm going to have to go to the docs one day this week and plead for a note so that I can get paid. Shocking predicament to be in but the company won't budge so if I don't want to go down a pay-band and lose £200 a month for the next 2 months it's got to be done. :(

Right, onto another matter that's bothering me a little lately. My sex life with C is pretty normal. As far as I can gather she's had a fairly standard history and so have I with one exception. Since my teens I've had fantasies about being with other guys and these fantasies come and go from year to year, sometimes month to month. C doesn't know about this, and if she does she's never mentioned it to me. When I was 27 I had my first and only experience with a guy and I really enjoyed it. Then shortly afterwards I lost interest and didn't get the feeling back again for another 2-3 years. I then got involved in the bi-gay scene for a short time in order to experiment a little should the opportunity arise. Something nearly happened with one guy but it was either self conciousness or something else that stopped me from doing anything with him. From that moment on I assumed that I wasn't actually bisexual as I'd concluded after my first experience and the feelings then died away again. It was a short time after this that I met C and we've now been happy together for almost 2 years. We have a nice house in a joint mortgage, cute dog (K) and a cute kid (J) and life is good albeit for the occasional work worry from both of us. Normal every day stuff really. My bi side is trying to fight it's way back into my life though and I keep getting urges to watch bi porn online which of course I can only do when I'm in the house alone like now. I have a feeling that this would either freak C out or just disgust her and whether she wanted to try and accept it as part of me or not it'd be the beginning of the end for our relationship. I couldn't cheat on her anyway and if I did I'd be completely stupid to throw away the life that we have just because of some erotic urges. The question is do I just bury my feelings and stop looking at the MMF (Male, Male, Female) porn online (which is difficult because it really turns me on), forbidding myself to think about it or watch it? It won't be easy but if I don't I'm worried that it'll just overtake me and I'll slip up somehow in the future. What should I do?