What should we do if one day our partner cheats on us ?
In my opinions, we only need to make a decision:
1. FORGIVE HIM :
Ask yourself do we still love him and want to forgive him? if the answer is yes, then forgive him, and never bring up his mistakes, don't be like a broken cassette, played over and over again to disgust him. If we have made the decision to forgive then sincerely forgive, and forget all the mistakes. Start with a new life. What if he repeats his mistake again? keep asking yourself, do you still want to love him and forgive him? If so, then forgive and stick to the principle of sincere forgiveness. Until when ? As far as your ability to be patient and forgiving. So patience has no limits, many people are often wrong, saying that patience has limits. In fact, if you really have a sense of patience then patience has no limits. That is why Allah loves those who are patient. Because a patient person is always full of love and forgiveness. Don't humans always sin and ask Allah for forgiveness too? And does God never forgive? Unless we repent too late, death comes, Allah never limits in giving love and forgiveness.
2. DIVORCE HIM :
If the answer is we don't want to love anymore because we are very hurt, then please take a firm decision to separate (divorce). No need to be angry with other people (his lover). Remember our partner can cheat, it's definitely not his own fault, but we are one of the causes, we are the cause of him cheating. Be honest with yourself, reflect, and find the answer. Even though we are aware that we have contributed to our partner's actions but we still don't want to forgive him, or we want to forgive but can no longer take it back. So have a good talk with your partner, and family, just say that we are no longer compatible and want to separate/divorce, no need to tell other parties or families about the reason this decision was taken. Only the two of us know. Let him go without having to take revenge by humiliating him. Remember that whoever covers the disgrace of others, Allah will also cover our disgrace in the hereafter. Always make Allah's rules the goal of life, insha Allah, we will be able to pass every trial that befalls us. All humans will separate, either by divorce or death. The important thing is never to destroy our faith in Islam. Stay true to Islam, that Allah never leaves us, Allah never tests us beyond our capabilities. Patience is still required here. Patiently accept everything that happens according to Allah's will. Not a single leaf falls without Allah's permission. Just remember that.
Hopefully this discussion is useful. Come on, give your opinion, and everyone is free to have an opinion because not all humans have the same nature, character, and thoughts. Each is free to express according to our heart.