While I cannot predict individual behaviors with certainty, I can provide some insights based on common patterns observed in relationships involving narcissists.
A cheating narcissist may or may not leave their spouse, as it depends on various factors, including the specific narcissist's personality, the dynamics of the relationship, and the perceived benefits they gain from staying or leaving.
Narcissistic Supply: Narcissists crave attention, admiration, and validation from others, known as narcissistic supply. If the spouse provides a significant amount of narcissistic supply, the narcissist may choose to stay in the relationship despite engaging in cheating. The spouse's devotion, loyalty, and willingness to tolerate the cheating behavior might be attractive to the narcissist.
Fear of Losing Control: Narcissists often seek control and power over their partners. Leaving the spouse might result in losing some of that control, especially if the spouse is dependent on or emotionally attached to the narcissist. In such cases, the narcissist may prefer to maintain the status quo and continue the relationship while engaging in cheating on the side.
Grandiosity and Ego: Some narcissists may believe they can have it all, including multiple relationships, without facing consequences. Their sense of entitlement and grandiosity might lead them to believe they can keep their spouse and engage in extramarital affairs without repercussions.
Lack of Empathy: Narcissists often lack empathy and may not consider the emotional impact of their actions on their spouse. They may be more focused on fulfilling their own desires and needs rather than considering the hurt they cause to their partner.
Narcissistic Cycle: As mentioned earlier, narcissists often go through idealization and devaluation cycles in their relationships. They may cheat during the devaluation phase as a way to assert power or seek validation outside the relationship. However, they might return to the idealization phase afterward to keep the spouse emotionally invested and willing to tolerate their behavior.
Opportunity and Circumstances: Whether a cheating narcissist leaves their spouse can also depend on external factors such as opportunities, financial considerations, and social consequences. If they find a new partner who provides a more enticing source of narcissistic supply or the situation becomes more favorable for leaving, they might be more likely to do so.
It's important to note that every individual and relationship is unique. Some narcissists may leave their spouse after cheating, while others may choose to stay. The decision may not be driven solely by the cheating but by a combination of complex factors related to the narcissist's personality and the specific dynamics of the relationship.