They are both different things. Infidelity is having a romantic or sexual affair with some person other than your spouse without the consent of your spouse. It's unfaithfulness in marital life. read more
Affairs: The Relationship Between Infidelity & Addiction Part 1: In the first of a 3-part series, Dr. Haltzman explores the relationship between addiction and those who cheat. read more
Adultery and infidelity being two such issues, it is common for these two words to be used interchangeably since both these words are used in similar contexts. However, one must discern the true difference between them in order to use them properly in certain contexts. read more