Suddenly, a clear-cut older sister appeared. I thought she had a serious personality, but it turns out she's a playgirl? One day, I witnessed my sister-in-law contacting various casual partners. When I pleaded with her, "Let's have sex," she said, "Sure, as long as you use a condom." So we tried it, but it didn't seem very enjoyable, so I secretly removed the condom and went raw, and she became sensitive and kept climaxing!
