There are many wives who reach a point and are "done" with sex. Does you wife offer any solutions or does she believe that you would be satisfied with Jerking Off, for the rest of your life?
My wife knows of and has joined in with giving oral sex and getting anal sex with other men and said if it pleases me then by all means get your satisfaction of sex through them.
If it has been another woman, she ignored it, like it never happened. Different world, different situations at our age. To satisfy my needs her solution was a Bi Option. I tried , with her knowlege then with her present. She embraced the emotions we shared as a result. Befor that it , she believed all I needed was to look at porn and jerk off.
My wife expected monogamy which equaled celibacy. Our sex lives began to slow up and stop altotegether shortly after we realized that three children were enough for us... anIt also took me a long time to realize she was not an affectionate woman, and maybe if she had been, the lack of sex may have been more manageable. She provided no solutions to this. It's just the way it is, as far as she was concerned. I remember not long after I met her parents when we were young and in love - her father joked "at least Santa gets to come once a year..." in a candid reveal of his own sex life... My wife did not support or condemn my sexual identification as a bisexual man - but she also made it clear that one wife equaled one life partner. Even when I suggested that sex with men would just be a way to release my sexual tensions, she saw no difference between sex with a man or sex with another woman - it was all cheating if she did not agree to it - and she did not agree to it. As time went on - of course, you probably already know - I did cheat and I did have sex with men without her permission. And as it turns out, it is very hard to keep such things from your wife. I have never had sex with another woman, though - as much as I may think that would be fun - I just simply have not crossed that line - out of respect for her and/or out of not really wanting to. At this point, for the last few years - we do not share a bed and we live fairly independently from each other - even though we share the same residence, but even there - we live in different parts of the house. It works OK - not perfect, but OK.
if both partners in a relationship entered into a 'marriage' with the 'expressed understanding of monogamy', then there has been a mutually-beneficial (non legal) contract with non-monetary consideration exchanged.. expectation of exclusivity IMPLIES/REQUIRES availability. voluntarily withholding of availability is a unilateral breach of contract. you are morally free to pursue your right to pursue Life's pleasures you revived at birth. (you might run that by her to communicate your needs.. your next steps may remedy your right to pleasure at the expense of property division and emotional isolation)..
