I was in the kitchen after bedtime and I heard my big sister CJ making a bunch of noise. I walked down to her bedroom and the door was cracked and I looked in. She was rubbing her pussy! I've always had a crush on my big sister so I couldn't resist watching. I was only going to watch for a second, but she caught me! I was so embarassed. I thought for sure she was gonna tell Mom and Dad that I was being creepy, but instead she said "you're just being curious. Here, you can watch". I can't believe my big sis rubbed her pussy for me!!