I have this ex who I dated for a loooong time and lived with for most of the time we were together. We met in gradschool and moved to my current city together when I got a job here. We broke up about a year and a half ago, and although we said we'd stay friends, we don't really see each other (maybe 4 or 5 times in the year and a half). But, we do text still pretty regularly and, partially because of our history and partially because he is incapable of meaningful communication, our texts are still the flirty banter that we favored when we were together.
The thing is, I have been seeing someone else for the last year. I met him pretty shortly after the break up with the ex and initially was reluctant to get involved again so soon but he's great and we have such a good time together so I thought I'd give it a go. And it is a go! We're happy together and I have no desire to get back with the ex. But, sometimes I think about how the current bf would react if he saw the texts with the ex... Probably not super well is my guess.
So, my ethical quandary: is it wrong to send flirty texts to my ex because I know my bf would find it objectionable even if it's highly unlikely that he would ever see them and I would rather adopt 18 cats, bronze my ovaries and die alone than get back together with said ex? Or is it just none of bf's business?