It's important to remember that individuals are complex, and it's not appropriate to make blanket assumptions about someone's behavior based on one trait like being a narcissist. Narcissism is a personality trait characterized by a grandiose sense of self-importance, a need for admiration, and a lack of empathy. However, it doesn't necessarily dictate whether someone will cheat on their spouse, regardless of their partner's financial status.
Cheating in a relationship can occur for various reasons, including dissatisfaction, emotional issues, lack of commitment, or a desire for novelty. While narcissists may have a sense of entitlement and seek validation from others, it doesn't guarantee that they will cheat on their rich spouse.
Infidelity can happen in relationships for numerous reasons and is not limited to a particular personality type. Factors such as individual values, emotional connection, communication, and the overall dynamics of the relationship play critical roles.
It's essential not to generalize or stigmatize individuals based on certain traits or labels. If you suspect infidelity or are facing challenges in your relationship, it's best to communicate openly with your partner or seek professional advice from a counselor or therapist to address the issues constructively.