https://www.youtube.com/watch?v=zLQLCU7933I
5 Signs The Narcissist Is Cheating On You | Infidelity and Narcissism | Narcissistic Personality

A narcissist is likely cheating if they frequently lie using bad excuses, distance themselves from you, or engage in suspicious behavior online. They also may go back and forth between affectionate and abusive behavior in order to keep you insecure and uncertain about their cheating. Gather the facts and decide what you want in the relationship before you calmly confront your partner.