I stand possibly corrected by the post citing Fr. Conchini (above.)
It may have been the Carthage Council's messenger, not Nicea's.
The great Council had absolutely forbidden bishops, priests, and deacons—in other words, all the members of the clergy—to have with them a sister-companion with the exception of a mother, a sister, an aunt, or, lastly, only those persons who are beyond any suspicion.I will note the absence of the mention of wife.