What is the ruling of the Sharia regarding a husband who discovered that his wife was not a virgin and confessed to him that she had committed fornication with her relatives and others, which led him to divorce her with three pronouncements, then he questioned his sin in not concealing her, and the ruling on her maintenance during the 'iddah, and whether his action was in accordance with the Sharia, and whether he has a legal right after his wife's slander against him, and how can he defend himself before people after divorcing her?

You were right to object to your wife kissing her maternal uncle, and you were wrong to ask her who deflowered her, and she was wrong to tell you what happened to her. If she had repented, you should not have divorced her. If she is persisting in immorality, then divorcing her is the correct action, and there is no blame upon you for informing her father if that would deter her from her evil deeds. If you need an answer for the reason for the divorce, give a general answer that does not expose her, such as saying: "She is not suitable for me." You may defend yourself against accusations directed at you without revealing her secrets. The divorce you issued: its ruling varies depending on the wording; it could be one pronouncement or three. If one pronouncement of divorce occurred and it was not preceded by two pronouncements, the divorced woman is entitled to maintenance during her iddah (waiting period) from a revocable divorce. However, in the case of an irrevocable divorce, she is not entitled to maintenance unless she is pregnant. What you gave her after the divorce, if it was a donation, is not counted as maintenance.