What is the religious ruling regarding the divorce I issued to my wife after a dispute between us, given that I repeated the utterance on more than one occasion, and then took her back and had intercourse with her? And what should I do after my wife confessed to me that she had a previous relationship with another person before our marriage, given that she had denied it previously?

If you pronounced a clear divorce (talaq) while fully aware and not out of your mind, the divorce has occurred, even if you were in a state of extreme anger. If you repeated the word of divorce with the intention of effecting more than one divorce, then the number of divorces that occurred is equal to the number of times you repeated it. However, if you repeated the word for emphasis, then only one divorce occurred. If you are unsure about the number of divorces, then base your decision on certainty, which is the lesser number. Since this issue involves detailed rulings and scholarly differences, it is best to present your specific case to a trustworthy scholar. Regarding your relationship with your former wife, conceal her past and forgive what has passed.