My cousin came to stay, and in the middle of the night my brother secretly started playing tricks

My cousin came to my brother's house to stay for a few days, then in the middle of the night he continued to secretly touch my brother's body, but it seemed like my cousin knew but still pretended not to know anything. Every day I wear more and more sexy pajamas to provoke my brother to continue, and then until he takes off my underwear to put him in…