Chance meeting in a car park

Our family (husband, wife and 2 children) were returning from our 2 week summer holiday in the Isle of Wight. Returning to our home in Basingstoke, Hampshire one of our children needed a toliet break so we planned to stop at the next Pub or Cafe car park just to use their toilet; it was late at night and we needed to get home. We stopped at a virtually empty car park and reverse parked alongside one of the few other cars - it was dark and we took no notice of the type of car nor the fact that two people were in it - my parents. My parents were unaware that we were returning from the Isle of Wight and were finsihing a day trip from their home in Bexhill, East Sussex. The car park was either in Hampshire or West Sussex. They too had stopped only briefly to use the facilities and had delayed driving off to allow us to park.