It's not the first time something like this has happened. There is a couple on our block, a Filipino lady and her husband who is maybe 15 years older than her and previously married.
She was looking at some pictures from his first honeymoon in Hong Kong and in a picture of them eating at a cafe, saw her cousin at a table in the background. She realized if that was her cousin, then an elbow sticking in from the edge of the frame must be hers. While she was still living in the Phillipines, her family had taken a trip to Hong Kong and eaten in the same restaurant as her future husband.