My Father in Law is a CHEATER! How I will tell to her wife?

It is none of your business at all cuddiluk and you should stay out of it completely. At this time all you have is the word of a friend of yours and if what that friend tells you is true, then your mother-in-law will soon find out for herself. No person has the right to interfere in the marriage between another couple. Also you have to consider your husband in this situation, because it is his parents you are actually talking about here. How do you think your husband will feel if he finds that you have been snooping or gossiping about his parents? I wouldn't think he would be at all happy with the whole situation, if in fact your father-in-law is involved with some other woman, but if you are the one to bring it out into the open, then it will be much worse. As I said, you have no proof and that also means you have no reason to pry. It might be that your mother-in-law does know what is going on but for a variety of reasons she has chosen not to tell you. That is her right as she too is entitled to some privacy, and you are talking about invading her privacy. Forget the whole thing, because it could actually be that your father-in-law is genuinely helping this young lady with her schooling, and there is nothing else in it. It could also be that his wife is aware of what is going on but they have chosen not to tell you. If they have problems, let them sort it out between themselves. If one of them does talk to you about the situation, then you should not comment at all. I repeat that it is their busines and if you do make any comment I believe that it will put a strain on your own marriage and certainly I wouldn't trust anyone who went snooping on my father.

I don't know about telling the truth, i've tried that b 4 with my bro in law about his baby's momma, and it just stirred up a whole lot of unwanted drama! So much that my husband will c his brother maybe once a year! So i say stay out of it! maybe ur mom in law just doesn't want to know the truth! sometimes some things r better left unsaid! if i can go back and choose whether i would tell my bro in law or not knowing all the drama it caused, i def. would not have done it! just really think about it.

It isnt up to you to do that. I think you are going to upset the apple cart.

let them solve their own problem. its not your business anymore. i understand your concern to your mother in law being also a wife but its different story if you the one who initiate the talk and besides you are not yet sure if its true or not. better off tell it to your husband, its her parents anyway.