My relationship with my sister changed one day. On a night when our parents were out, I found myself alone with her. An awkward tension mixed with excitement overwhelmed me, and I lost control of my senses. Then, I noticed my sister acting strangely too, as if she were equally aware of the moment. No words were needed. Without speaking, guided only by the atmosphere, we naturally ended up having sex. From that instant, my bond with my sister became one where just meeting each other's eyes made us silently rush into animalistic passion. After that, no matter where we were, whenever our eyes met, our bodies moved instinctively. This relationship evolved beyond mere physical desire, becoming a special, unbreakable connection between us.