My sister was doing her homework on the kotatsu and had fallen asleep. Her feet were in the way inside the kotatsu. When I peeked inside, she was sprawled out with her panties fully exposed! Even though I knew it was my sister, I couldn't resist the temptation of a panty shot and crawled in for a close-up view! As I watched, I felt an urge and touched her crotch, only to find her panties getting wet!? However, our parents came back, interrupting the act… but it turned out she was actually awake. She grabbed my wrist and pushed me towards her crotch… My aroused sister demanded incest right there with our parents nearby!
