I've seen this happen with an Elder in a neighboring congregation. The funny thing about it was while he was still an Elder, and I was a teenager, he gave me some advice. I was at a quick build, and there was plenty of young people with raging hormones. Myself and another unbaptized gal started hitting it off. I guess it was somewhat noticeable to others there. We were both too young to consider "dating with a view to marriage." At that time I can truly say I loved her. Maybe puppy love more than anything, but I enjoyed her company, and it was more than hormones at play. Anyways this Elder decides to pull me aside discreetly, and tells me, "Bro.Misery watch yourself around these girls. I'm not telling you what to do, but be careful around them, because things can happen." My memory might be slightly off on his exact words, but its close enough. Now here's where it gets interesting. This Elder was married, wife a full time pioneer. The girl that I had a crush on was unbaptized, as was her brother at the time. Their mother was a widow, and baptized. So this Elder would go to their house, by himself mind you, and "study" with this widow's son and daughter. I guess he saw himself as helping out spiritually. Whatever good he saw himself as doing, he never the less should have taken his own advice that he gave me. Because eventually he had an affair with the widow. Left his wife, got disfellowshipped as so did the widow. The ex-wife was devastated, I mean very devastated. Eventually she got involved with a nonJW and had a kid. She wasn't married, and I guess her attitude relfected that of someone scorned, and not that of repentance. Well, she got DF'd too.
All are now reinstated, and the newly married couple attend a hall clear across town where nobody knows the details of how they got married with the exception of the Elder Body. You and I know there are plenty of Elders who can't keep their mouths shut, so chances are some in that hall may know the extenuating circumstances. The ex-wife with her son attend another hall closer in proximity to the hall in which this all happened. I guess she feels comfortable there being that everyone knows what happened, and view her more as the victim than anything. The girl that I had a crush on back then no longer attends meetings, and was never baptized. Her brother who is a very kind man, eventually got baptized, and then his wife got DF'd and left him. Now he no longer attends meetings. It was all just one screwed up state of affairs that I wish had never happened, nor knew about. When I hear sactimonous, self righteous JWs say, "only Jehovah's people!" I nod in agreement, then I wink my eye at the wall and keep steppin.