Used to describe a man whose wife is unfaithful.
Al enterarse de la infidelidad, se convirtió en un cornudo sin querer.
Upon discovering the infidelity, he became a cuckold without intending to.
Él se convirtió en un cornudo sin saberlo, ya que su esposa le fue infiel.
He became a cuckold without knowing it, as his wife was unfaithful to him.