Another country coincidence

Visited husband's family who lived in Buffalo, NY State, in October 1967. We travelled on the Greyhound bus to New York for a weekend stay to look round the big city, with my brother-in-law David and his wife Dot. We passed a NY policeman on the street, who was just standing there observing the people dashing here and there, and upon impulse I turned round and took a photo of him, showing him and quite a bit of the background. I thought no more about this. When I returned to work from holiday, I was showing the photos to the girls in the office when one of them fell really quiet and asked me if I knew a lady in the photo who was about to walk past the policeman. I explained that it was a random photo, taken on an impulse, and what was the problem? She said that the lady in the photo had been her French teacher at her grammar school in St Helens; she had married an American man and gone to live in New York I was flabbergasted and asked if she was joking or messing about, but she stoutly denied that she was and said every word was true. What were the chances of that - a city of 8 million people (as it was then) and I chose the very moment to take a random photo when this lady was passing by.