My mom and step-father did.
I was 11 and they were only dating for a couple of months when all of the sudden my mom sat my brother and I down and asked if we would still follow the "truth" if she were to be disfellowshiped. (I should have taken the out right then) A week later she was only reproved and my soon to be step father was disfellowshiped. A few weeks after he was reinstated, they got married.
It took a few years for me to realize what happened. Being 11 at the time I didn't but 2 and 2 together. Later on I found out he was disfellowshiped because he was a repeat offender. Apparently, before he met my mother, he slept with his landlady a non-jw. I don't know what gets into these people to go and tell the elders.