I used to run a very successful server for BioWare Neverwinter Nights back in the early 2000s. A guy started playing on there when he was 15 and met a married woman in her 30s. She got divorced and a few days after he turned 18 he flew out to meet her.
They got married about 12 or 13 years ago. I was the best man, and they are still married. I talk to them daily and usually see them weekly. It happens.