I can’t speak to cradle Catholics, but this is the exact situation my husband and I were in. I will share the pastoral advice we received.
- You cannot “accidentally” commit a mortal sin, or sin without realizing it. Since when the procedure was performed we (protestant) were not informed it was sinful, a mortal sin was not committed. We were advised by doctors ( a couple of them) not to have more children as another pregnancy would be a threat to my life, as well as the unborn child’s. We were making the best decision we could for our family at the time. He felt that as many Catholics struggle with contraception, he certainly wouldn’t expect a protestant couple to be observing Catholic theology on the matter.
- Although our act was not “Catholic”, the clergy did appreciate that our motives were to preserve our marital intimacy, and he felt that our marital intimacy was important, even if we were unable to bear children from the marital act. He did not in any way pass judgement on us. He was extremely compassionate about the situation we found ourselves in.
- He did not expect us to have the procedure reversed (expensive, and could have potential problems of its own) or stop having marital relations. He felt that ceasing marital relations was potentially far more damaging for us as a couple than having them without the ability to procreate (an ability we would loose completely in a few years anyway). He cared deeply about the state of our marriage, especially as my husband is not devout, or planning on converting and would not take kindly to being told we were ceasing relations.
So when this problem was taken to the church, the response was forgiveness, grace, empathy, and compassion, and a desire to have us “come home” to the church. He did make sure our marriage was a first marriage for both of us, so there would be no issues there. If we had faced what you were suggesting, to be honest, we would have run in the opposite direction.