You upset your dad today. He told you you had to use the restroom before he poured you a cup of juice. You agreed and waited. Then, when he was sufficiently occupied with work preparation, you helped yourself to the milk. Thank you for using a straw. Even though dad’s a little mad, you technically did not disobey. You did not drink the juice. I wouldn’t recommend, however, that you display your intelligence like this again. He won’t take it well.