what if you find out your parents / in-laws is cheating ? what will you do ? Will you ask them or tell them?

If parents i will question them and make sure no more stupid thing happening/going to happen. In laws, cant be bothered. Anyway this happened to me. Both in laws already have marital affairs before hub and i got together. However, if any "funny" business happens, i will tell hubby. Other than that, don bother to care as long as it doesnt affect hub and me. Whatever they wanna do is their businesses, they are old enough to know what is right and wrong. Furthermore, if you try to say them, they can rebuke u by saying "who are you to even interfere"