Most likely the situation.......if you can`t trust your partner,get out of the relationship,but I still do hold fast that most women cannot be trusted in more ways than one,not just sexually.
I must be different, but I encourage my woman to show more titty and tease the men, she is very shy and never flirts with men, and I am the opposite, I hit on every strange girl who gives me her ear, and this drives her nuts, mostly it is innocent flirting for some new and novel wank bank material, but it drives her nuts, just on Saturday we went for a walk in the hills, then to a vegetarian hippy cafe where I chatted up a beautiful 21 year old girl who gave me some freebies, it cost me an angry jealous diatribe on the car drive home, but it was worth it for a moments self deception and fantasy that I would one day nail that hard young body until my dick reddened and began to bleed and I have cum so much and fucked so continuously, that every subsequent fuck leads to an almost cumless orgasm.