Such a cheeky person in the world, he is my man's brother, we share a room, he never washes the dishes after dinner, including what he eats alone, never.

Tell him well that you should be nice to him when no one is around, otherwise it will be counterproductive. Generally speaking, you have to keep his appetite alive. Just tell him you want to play the goddess. No, I have a beautiful goddess who plays very well. Now I'm single. Do you want me to introduce him to you? No, when he is so interesting, you can get rid of his bad habits as you wish, but remember that you are his sister-in-law and you should be tolerant of the atmosphere.