Mom, when you were leaving you stated “I noticed a change. You came out and helped us.”
To be honest, I was on the fence about coming out and helping. My thought process was: these are 2 mature adults who know how to take care of themselves. If I come out and volunteer help, that could be distracting them from their focus. Or it could be seen as insulting their intelligence.
In the end, I did come out.
But please understand: there are many ways to evaluate a situation. And my idea of what is the highest good for all involved may be different from your idea and without explicit communication, problems can arise.