Dreams involving intense situations, such as the one you described, can often reflect deep-seated emotions, fears, and desires in waking life. Here's an interpretation of your dream:

1. Family Dynamics: The presence of your sister-in-law and children suggests that family relationships and responsibilities are significant to you. You may feel a strong protective instinct towards your loved ones, indicating that you prioritize their safety and well-being.
2. Fear and Protection: The feeling of fear and being boxed in during the dream could symbolize a sense of vulnerability or anxiety in your waking life. It may relate to situations where you feel overwhelmed or threatened, prompting a strong desire to protect those you care about.
3. Confronting Threats: The encounter with the tall figure with red eyes could represent a looming fear or challenge that you are facing. Your response—chanting and trying to expel the entity—indicates your desire to confront and eliminate negativity or harmful influences in your life.
4. Conflict and Resolution: The latter part of the dream, where you face intruders and engage in a fight, suggests an internal struggle. It may reflect feelings of anger or frustration that you have not fully addressed. The act of defending yourself and your family can symbolize your resilience and determination to overcome obstacles.
5. Empowerment: The transition from fear to a sense of relief at the end of the dream signifies empowerment. You took action to protect your family, which reflects a strong sense of agency and the ability to confront fears. This could indicate growth or a newfound strength in dealing with challenges in your life.

In summary, your dream seems to encapsulate themes of fear, protection, and empowerment related to your family and personal challenges. It might be helpful to reflect on any current situations that make you feel vulnerable or threatened and consider how you can address those feelings constructively.