um. this totally happened with one of my sorority sisters. He was her basketball coach from like middle school on, AND they started dating when she was STILL in high school!
He was like 40 at the time, and they dated throughout college, she pledged my sorority, and continued with school. I believe she JUST graduated and they've already been married a year. plus... he is SUPER CREEPY........ I wasn't really close with her but I was her APM and lived down the hall from her after she moved into the house.... She was a nice girl but a little off herself.... the family didn't agree at all btw, but basically accepted it after so long...