Need help

My wife and I have been married for 5 years and together for 10 total… we have 2 amazing children together and I pride myself on being a helpful husband and a very involved father. I am ashamed to admit that following both the births of our children, I was not the most supportive with my wife post pardum. I was there for our children and helped with everything she asked but at the time I wrongfully assumed she was feeling up to seeing family. This is something we have talked about and she does not gripe about it or bring it up often. But it does come up and I know it is something that is hurtful to her. I think I was more concerned with showing off our new babies and not thinking about how everything made my wife feel. We are done having children so I obviously don’t have an opportunity to redeem myself that way. I know I can’t undo damage I caused when she was at her most vulnerable but I’d like advice on how to convey to her that it wasn’t my lack of caring for her it was more my lack of understanding of how bad she was feeling at the time. I’m not making excuses because I’m not dumb, I know child birth is hard on the body. I’m upset that I wasn’t the husband I wished I was for her at that time.