London travel coincidence

In August 2004 we travelled to London on our narrowboat. While moored in Little Venice, one day I had to take our younger son to Cambridge by train, while my husband took the older boy sightseeing in London, agreeing we'd all meet back at the boat 'whenever' that evening. Heading back to the mooring at the end of a very hot day, they were slumped on a train on the Bakerloo line at Baker Street when son 2 and I stepped in to the same carriage through the same door and sat down on the two seats opposite them. We were all so weary, we just greeted each other with a casual, 'Hi, how was your day?'. Onlookers in the carriage must have wondered, from our apparent lack of surprise, how we could have engineered to meet like that.