Is li'an (mutual oath-swearing in an accusation of adultery) or divorce preferable for the husband?

Question:
Why does the husband resort to li'an when he holds the bond of marriage in his hand, and he has the right to divorce her whenever he sees in her something that harms his honor? What is preferable for him: does he take the matter to the judge, or does he divorce her to cover her?

Answer:
If he divorces her, the matter is over. But if he says, "I am afraid that if I divorce her, the child will be attributed to me and become my son, and I am not reassured about him," then li'an is necessary. Yes. But if he divorces her, everything is over. We do not oblige him to go to the judge and perform li'an. If he divorces her, the matter is finished. Yes.