I have the same fantasy/desire, to get pregnant by someone other than my husband. Getting close to being too old for us to enjoy raising another though. Hubby is a bit older than I am too. I had hoped it would happen with my Boss/Lover of 11 years, but he is even older than my husband and we ended our relationship during the pandemic (he got REALLY crazy about conspiracy theories). Now that I am without a relationship outsode my marriage, all my old fantasies of a pregnancy that is OBVIOUSLY not my husband have come roaring back. Meeting people is even more complex now, we no longer work in the offices post-pandemic and that is how most of my affairs started, with co-workers.
J (the wife)