Article 257

Should the wife commit adultery at or about the time of the conception of the child, but there was no physical impossibility of access between her and her husband as set forth in article 255, the child is prima facie presumed to be illegitimate if it appears highly improbable, for ethnic reasons, that the child is that of the husband. For the purposes of this article, the wife's adultery need not be proved in a criminal case. (n)