Please keep in mind that seeking advice from a qualified therapist or counselor who can work closely with you is essential for a proper understanding and resolution of your feelings.
Transference: In therapy, it's not uncommon for individuals to transfer their feelings and emotions from one person to another. Since you've stopped stalking the narcissist, your mind may have shifted its fixation onto the narcissist's family as a way of replacing the previous obsession.
Unresolved Issues: Your obsession with the narcissist's family might be a sign of unresolved issues from your past experiences with the narcissist. There might be unresolved emotions or unprocessed trauma related to the narcissist's actions or behavior, and focusing on their family could be a way for your mind to try and understand the dynamics that contributed to the narcissist's behavior.
Familiarity and Connection: The narcissist's family may have been involved in the narcissist's life, and your mind might be seeking some form of connection or understanding by examining their relationships and dynamics. It could also be an attempt to gain insight into the origins of the narcissist's behavior.
Feeling of Loss: Leaving a relationship with a narcissist, even though it's healthy and necessary, can still create a sense of loss. Your obsession with their family might be a way of holding onto a part of the past or feeling connected to what once was, even if it was negative.
Control and Closure: Obsessing over the narcissist's family might provide a sense of control or closure for you. By trying to understand their family dynamics, you may be seeking answers or looking for ways to make sense of the narcissist's behavior.
Avoidance: Focusing on the narcissist's family could be a subconscious way of avoiding dealing directly with the emotional aftermath of the relationship with the narcissist. It might be easier to focus on external factors rather than confronting your own emotions.
Regardless of the reasons behind this obsession, it's essential to address these feelings and work through them with the help of a therapist. They can provide you with the necessary tools to cope with these emotions, process your experiences, and move forward in a healthy way. Be patient with yourself, as healing from the impact of a relationship with a narcissist can take time, and seeking professional support is an important step towards healing and self-discovery.