A few years ago when I was 19yo (male) and my little sister was 18 yo (female). We went camping with our parents. Like every time, we shared the tent between us. On the last night of the tripping trip we had a little too much too drink and my little sister was a bit tipsy. We went to bed early. At around 1am I woke up to go use the bathroom and by the time I got back to the tent my sister was laying on the outside of her sleeping back with her panties cover ass pointing at my direction. I was mesmerized by the sight and didn’t know what to do. I just sat there for at least 10 minutes just staring at it. At the end I worked up the courage to bend my head down to her ass and took a sniff. It was so sweet of a smell. I tried to move the crouch of her panties to one side but her panties was too tight and I couldn’t do. Fearing that she will wake up, I quickly tried to go back to sleep. This was the start of my infatuation with her.