Evaluating Listening Skills & Nonverbal Behavior

My sister and I are very close, to the extent where we can communicate just from our body language. All we need is to make eye contact, and a quick nod or facial expression is enough to understand each other. For example, when she asked me what snack I would like to have while watching the TV, all I had to do was grin at her, and she immediately knew that I wanted my favorite chips. She could deduce this because while we were restocking the groceries in the house, I specifically added the bag of chips to the cart while we were in the supermarket. When she asked the question, she was seeking confirmation if I wanted to eat the chips now. I knew what she meant when she asked the question, so I could not help but grin. Hence, when I grinned back at her, there was a mutual understanding, and she knew to bring in that bag of chips. 

I appreciate that our relationship is so close that we can communicate with the least amount of speaking possible. Our non-verbal communication is likely due to how well we understand each other. However, we were not always this close. In our younger years, we would frequently bully and ridicule each other. The house still has the damages from one of our previous fights. We were not fond of each other and will see the other as competition, probably due to our Asian upbringing. But around our teen years, we suddenly stopped fighting and started looking out for each other. 

I think we both realized that we should not be putting the other down and care for each other instead. We have never mentioned this to each other but I know that we both have a secret mutual understanding that we only have each other to depend on for the rest of our lives. After all, we grew up together, so the person that understands us best should be our siblings. In the case with my sister and I, we understand each other so well that we can communicate non-verbally most of the time. I belive the best kind of relationships are those where both parties can silently enjoy the company of each other.