I haven't read the whole post through but just wanted to say that, as many of you know I used to be a mistress to several men for many years and I could never believe or understand how their wives didn't discover their affairs.
I posted on here about a year ago about how I was constantly amazed and dumfounded as to how their wives never suspected a thing. We would have weekends away, late night conversations and in some cases almost normal relationships.
I concluded that men must be very very good at deceit; even when one wife found evidence he was able to wriggle out of it.
These men had pictures of me on their phone, saved Msn conversations on their pc's and credit card bills which obviously must have shown out meals, hotel stays and holidays.
Now I have put that life behind me and I have a new (single)partner,it worries me that I know as much as I do. One of my married men's wives used to check on him constantly (presumably I wasn't his only Mistress)and she never found a thing - we were seeing each other twice a week for 2 and a half years!
I never check up, it rarely occurs to me, maybe it would be different if I were married but I for one could be easily cheated on.
In summary I think that you can never be 100% sure your DH/DP wouldn't do it - I can remember a conversation on a girls night out I had with one of the wives in which she said that she knew her DH was faithful, she would bet her life on it as they had been married 12 years and he had very high, old fashioned morals, plus he never went out in the evenings. Her DH had been a regular at a Swingers club for about 6 months but he only attended in the afternoons to avoid suspision.