I can provide some general insights.
Cheating can cause anxiety for anyone, including a narcissist. While narcissists often exhibit traits of grandiosity and a lack of empathy, they are still human beings with emotions. Although they may not experience anxiety in the same way or to the same degree as others, cheating can still trigger emotional turmoil and distress in some cases.
Narcissists may be more concerned about the impact of their actions on their self-image and how others perceive them rather than feeling genuine remorse or guilt for their behavior. If they fear being exposed, losing control over their image, or facing consequences for their actions, it could lead to anxiety.
It's important to note that the emotional responses of individuals, including narcissists, can vary widely based on their personality, upbringing, and life experiences. Not all narcissists will respond to cheating with anxiety, and some may display anger, denial, or other defensive behaviors instead.
If you are dealing with a situation involving a narcissist and cheating, it can be challenging to navigate. Seeking guidance from a mental health professional or counselor with experience in dealing with narcissistic personality traits can be beneficial for support and understanding.