The West Indies coincidence

It is my husband's coincidence, not mine. My husband was stationed in the West Indies when in the airforce in the 1960s. He was billeted in a hotel owned by a family with several children, the youngest of whom was about 9. After leaving the airforce in the early 70s he went to teacher training college as a mature student where he met me and another student who was to become his best friend. Some years later, when arranging a visit to come to stay with us the aforesaid best friend said he was bringing his new girlfriend (later to be his wife). When they arrived he introduced us to the girlfriend (guessing the situation) and after some discussion my husband realised that they had in fact met many years before. Yes.... she was the youngest daughter of the family with whom he had lived when stationed in the West Indies.