You found used panties and wonder what to do with them. First thing that comes to mind is to throw them away, but would that not be a waste? After all, you are all alone on this trip with nothing to do, so why not use them to jerk of? They probably belonged to some sexy slut anyway. And you are right. They belonged to sexy maid who will enter your room unexpectedly to clean it up with her beautiful colleague. Now you have some explaining to do...