HiCustomer Thank you for asking your question on JustAnswer. By the way, it would help us to know:
-What are your ages?
-How many times has he been in contact with the other woman?
-Do you live together or apart?
-Why did his marriage end?Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
My suggestion to you is not to marry him until you know for sure that he is done with this woman and the website. He sounds like he may have the start of a sex addiction or addiction to the dating site, which you should make sure of that before you marry him that he will stay faithful to the marriage. If he has contacted her even after you confronted him with the information that should be a warning sign to not rush into marriage if you are not sure he will be faithful to you and the marriage. If he wants to sow his wild oats he should have done that before making a commitment with you and promise of marriage. If he wasn't ready to give all of that up then he should not have started a relationship with you or anyone else until he was sure he could be totally committed to the relationship.
You don't want to marry him only to find out it was a huge mistake so why not put off the wedding until he can show you that he is serious about marry you and being with only you. Just the fact that you have such insecurities about this shows that the two of you should wait to make any major decisions, you should never go into a marriage with doubt or regrets because marriage is suppose to be a new start for the two of you to begin your life together. Maybe ask him to possibly go to a counselor before marrying him this way he can get the help he may need and figure out why he feels the need to find other women when he has a loving woman right at home for him.
There are some men that genuinely love their mate but for some reason can not be faithful and I'm not saying this is the case for your fiance' because as far as you know he hasn't cheated yet only talked about doing it so with some help and counseling there is still hope for the two of you but he has to act NOW. I think because of his bad experience he may be nervous about taking that big of a step again. Just make sure he get some help before you get married or that he proves to you that he will not do this again after you are married.
You're quite welcome and if you ever need my help again ask for me by name I will be happy to help you.