It seems like you're facing a complex situation involving Alex Cade's sister and their feelings towards you. Here is a step-by-step approach to dealing with this issue:

1. Understand her perspective: Try to put yourself in Alex Cade's sister's shoes and understand why she may be feeling this way. Perhaps she is protective of her brother or has concerns about your intentions. Empathy can help you address the situation more effectively.

2. Clear communication: Approach Alex Cade's sister with open and honest communication. Find an appropriate time to discuss your feelings with her. Let her know that you value her feelings and that you respect her brother. Assure her that you don't have any intentions of taking Alex Cade away from his family.

3. Reassure her: Provide reassurance that your interaction with Alex Cade does not mean you are trying to take him away from his sister or their family. Emphasize that your connection with Alex Cade is simply a friendship or a mutual interest.

4. Address misunderstandings: If there are any misunderstandings or miscommunications, clarify them. Share your perspective and ensure that she understands your side of the story. Avoid getting defensive or confrontational, as it may escalate the situation further.

5. Set boundaries: It's essential to establish clear boundaries with Alex Cade's sister. Make it clear that your attention towards her brother does not mean you are trying to intrude or cause any harm. Assure her that you respect their family dynamics and will be mindful of their feelings.

6. Give it time: Relationships and trust take time to develop, especially in complex situations. Be patient and understanding, allowing Alex Cade's sister the time to process her feelings and adjust to the situation. Eventually, she may become more accepting of your friendship with her brother.

Remember, it is crucial to approach this issue with understanding, empathy, and respect for their family dynamics. By communicating openly and honestly, you can work towards resolving any misunderstandings and building a healthier relationship with Alex Cade's sister.