Confirm whether the information is correct
Never confront your husband unless you are 100% sure about the information. You must confirm every bit of information you have before taking any major step. If the accusation is not true, you may have a torrid time to clear things afterwards.
Inform the husband
If the information is correct, you should tell the husband about it. He should know that you are aware of him cheating you. You should not keep it inside you as that would further encourage the relationship.
Express your disappointment and anger
Do not be lenient in handling the situation. You must tell the husband how angry you are. Show your disappointment and let him know that you are disturbed. Ask the husband whether the relationship with the other woman is over or not.
Make a decision
You must make a decision on your future. This is vital as your whole life would be in front of you. You need to think about your children also. Decide whether you want to stay with your husband or not. If you feel that the relationship with the other woman has ended, try and give him another chance, for the sake of your family's harmony.
After you decide to stay with the husband, let him know about any expectations or guidelines he should follow. There is a time for everything. You must forgive the partner when you feel he has regained your trust and when you know that he is ready for a new start.