I can offer some insights based on common patterns in relationships involving narcissistic individuals.
Narcissists are often motivated by their own needs and desires, and they can be attracted to partners who provide them with validation, admiration, and material benefits. In this case, your ex-narcissistic partner might have been drawn to the older woman with money for various reasons, such as financial security or the ego boost that comes from being with someone who provides a certain status.
While they might appear happy on the surface or in the initial stages of the relationship, it's important to remember that narcissists often have a pattern of behavior that involves manipulating and exploiting others for their own gain. Their happiness might be superficial, and the relationship may be built on unstable grounds.
Furthermore, it's essential to consider that your perception of their happiness may be influenced by your own emotions and feelings about the breakup. Comparing your life and happiness to theirs may not be productive for your healing process.
If you've been through a challenging experience with a narcissistic partner, it's crucial to prioritize your own well-being and focus on your healing journey. Surround yourself with supportive friends and family, seek professional help if needed, and give yourself the time and space to heal and rebuild your life in a positive and healthy way. Remember that your worth and happiness are not dependent on your ex's current relationship status or choices.