It seems like your therapist might be using a therapeutic approach that focuses on internal family systems or parts work. In this approach, the therapist helps you explore and understand different aspects of yourself as if they were different "parts" or "characters" within you.
When you mentioned your fear of your therapist going on holiday and your jealousy of her kids, she may have interpreted it as an indication that there are unresolved emotions and experiences from your past (inner child) influencing your current reactions and feelings (adult part). By encouraging your adult part to attend to your inner child, your therapist may be trying to help you connect with and address those unresolved emotions and experiences from your past.
In the internal family systems approach, the therapist aims to facilitate communication and understanding between different parts of yourself. By doing so, you can better understand the root causes of your emotions and reactions, and ultimately work towards healing and integration.
If you find that this approach doesn't resonate with you or doesn't address the concerns you want to focus on, it's essential to communicate this to your therapist. Effective therapy requires a collaborative relationship, so discussing your needs and preferences with your therapist is crucial. You may also consider exploring other therapeutic approaches that align more with your goals and concerns.
Remember, therapy is a highly individualized process, and finding the right approach and therapist for you is essential for achieving the desired outcomes. If you feel uncomfortable or unsure about the therapeutic direction, don't hesitate to have an open and honest conversation with your therapist to ensure you are on the same page and working towards your personal growth and well-being.