Had vasectomy before I knew it was ..

My wife and I were both raised Novus Ordo Catholic. Many years later, after starting a family, we joined a traditional Latin Catholic Church. prior to this, we had had three children, and I had gotten a vasectomy. At the time I did not know that it was a mortal sin. I spoke to the priest about the severity of the sin, and he explained that, if you do not know that something is a sin, it carries much less weight.

My issue is, now that I am sterile, my wife thinks that intimacy is essentially meaningless because the point of intimacy is to create life. This has been a huge struggle for me and has made me feel extremely resentful, especially since we were both on board with it at the time . Any thoughts are welcome