What are the signs that your spouse may be cheating? Sometimes you know, and sometimes you don’t. When infidelity happens in a marriage or other committed relationship, one of the worst parts can be all the lies. Someone you have loved for so long suddenly is keeping secrets, and it hurts. The big question, why is your spouse cheating? First, realize that there are many ways to cheat, and there are many signs of a cheating partner in a relationship. There can be both emotional infidelity and physical infidelity signs. There doesn’t seem to be a huge difference between infidelity signs in a woman or infidelity signs in a man; though each person is different. Trust your gut.