What will you do if you know your partner is cheating ?

You could confront him and if he denies then you need to face the fact that he might have a cheating husband syndrome. 1) first deny and demands u show evidence. 2) when confront with undeniable evidence blames it on you and how you made him do it. 3) if above fails and you pursued, he will turn it around on you and blame that u destroy everything, the relationship, marriage, kids and whatever else. So think about how you want to deal with him calmly, speak to a marriage counselor , your pastor or a wiser elder if you find the above points checked.