Don’t you think it is possible that Peter’s wife died?
An ordained permanent deacon in the Latin Church can be married, but if their wife should die, they cannot re-marry.
Another thing — Peter left EVERYTHING and went off to follow Jesus.
If his wife was dead then he followed Jesus and that makes sense. Then after Jesus’ crucifiction Peter could have remarried because I also heard that his wife was martyred. It wouldn’t make sense that he left his wife to follow Jesus.