So I purposely kept taking my underwear off and leaving them on my bedroom floor right by the entrance of the door, I did this for about 3 days before chucking them in the wash so there was a pile of 3 used panties spread out on the floor. I was downstairs and my brother walked past, I asked him If he could go to my room and grab me my headphones as I ‘wanted’ to listen to music. He said sure and wondered off… he was gone about 5 minutes when it should have taken him like 60 seconds at most. He returned with red cheeks, I asked him what took him so long as I was quite suspicious of his activities. He looked surprised and struggled to answer me, he just handed me the headphones and continued doing whatever he was doing. I started smirking when his back was facing me, quite intrigued with his reaction as that was what I was secretly hoping for. I left it about 5 minutes before going back to my room, and I was astonished to find that my underwear location had definitely been relocated slightly as if someone had picked them up and tried to place them back down on the floor in the same location, clearly not doing a very good job of it but at least he tried. My job here was done, and this was a clear indication that maybe he actually is interested in his little sister.
Source: reddit.com/r/eroticliterature/comments/i5fo9a/story_2_when_i_left_my_worn_underwear_on_my