Is it permissible to divorce a wife who has repeatedly cheated on her husband while he is abroad for long periods?

A wife's betrayal of her husband is one of the gravest major sins, especially committing adultery. However, it is not permissible to accuse her of such merely based on suspicion; rather, clear evidence or a confession is required. The husband's absence is not an excuse for her; instead, she should have requested to return or sought a divorce. Legally, these actions do not make the wife forbidden to her husband, but it is forbidden for the husband to continue her marriage if she persists in committing adultery. If she repents, it is better for him to keep her, but there is no sin if he divorces her. The husband's absence can be a cause for corruption.