Depending on how his actions are at home,i.e. love life or talking to you,I would act as hs is not needed at home and make it a point where you continue ith your life. Try not to talk about the other woman. If he comes home late maybe try to leave the house a before he comes home and let him wonder where you at. If he is cake eating that ill tear him up and he will start questioning you. You have show him what he has in you and yo wont tolerate his behavior by not telling him but ations. I hope this helped and its easier said than done but depending on where he at in his life he will notice that you will not tolerate his behavior just avoid arguing with him