An Act of Infidelity to gain an advantage over a partner that has formed trust or a commitment with cheater. Mostly going undetected by the uninvolved party and usually accomplished through lies of omission or commission. Typically, whether it is advertant or inadvertant, It can do emotional damage to the partner uninvolved. At times, more than physical cheating because sometimes physical cheating is just about the sexual relationship and not much else. emotional cheating is particularly hurtful because its two parties forming a bond that the uninvolved party don't know about or may have been misrepresented.
Yogi is such a whore, she was emotional cheating on Dee with Charlie, and acted like nothing was wrong because she wasn't fucking Charlie.