If it was not proven and the innocent party divorced and married someone else, then they could be hauled up in front of a judicial committee and be charged with committing adultery and disfellowshipped!
Even more idiotic was the rule that a friend of mine was subjected to some years ago. His non-JW wife left him and filed for divorce. He was pretty well devastated. Before the divorce was finalized she realized she was better off with him than not and asked to reconcile. He agreed. The elders got wind of it and hauled him in the back room and told him that he MUST let the divorce proceed. They used Ezra 10:10-12 to prove their point . . .Then Ezʹra the priest rose and said to them: “You have acted unfaithfully by marrying foreign women, and so you have added to the guilt of Israel. 11 Now make confession to Jehovah the God of your forefathers and do his will. Separate yourselves from the peoples of the land and from these foreign wives.” 12 To this the whole congregation answered with a loud voice: “It is our duty to do exactly as you say." When he questioned their instructions they used Ezra 10:8 . . .and according to the decision of the princes and the elders, anyone who did not come within three days’ time would have all his goods confiscated, and he would be banished from the congregation."
No room for any kind of kindness or forgiveness there! A helluva lot of cherry-picking from the Bible. And now twenty years later he still carries a torch for her, and she is still single. One just has to appreciate how much the JW's cherish family! NOT!