Bizarre encounter

My sister, a friend and I went for a woodland walk on a Spring afternoon about 8 miles from where we live. As women do, we talked and talked. On a fairly steep slope we stopped to catch our breath and I was in the throes of explaining my frustrations about a recent unproductive visit my husband had had to see the GP. My voice was raised and I was facing my two companions. Suddenly, in the almost empty woods, my voice trailed off as, behind my sister's back, over her shoulder, a couple with two children were passing. The man was the doctor I was just complaining about! I hoped he hadn't heard me and felt really embarrassed. He never acknowledged me. My sister and friend wondered what on earth had happened because I stopped mid sentence and the colour drained from my face. I had to wait until he had walked far enough away to explain myself. We were all amazed.