I vaguely remember a situation many years ago in a country where divorce was not allowed. A JW couple split up and one of them went and lived with someone else and was disfellowshipped. The innocent party could not get a divorce in order to remarry according to the law but was free to marry according to WT dogma.
The outcome was that the innocent party was told they could live with the new love without being disfellowshipped but would need to accept any negative feedback from people in the area.
Someone may remember this case and fill in some more details and the country involved.
George