Because I am the Most Knowledgeable,
Your friend’s younger brother is probably the most annoying person I’ve ever met, and I’m still looking for something that tops him. Even though you are not related to each other by blood, the relationship that you share with this individual will always be quite comparable to that which exists between brothers and sisters.
It is times like these that make you realize just how annoying they can be; after all, it’s not like this little guy has any business instructing you how to do your work; it would be one thing if he were just attempting to make small talk with her, but that wasn’t the case. You realize just how annoying they can be when you find yourself in situations like these.