You were minding your own business on the couch, scrolling through your phone, your young sister calls for you in the bathroom, she wants you to get her towel. You come to the bathroom with her towel in your hand, with your phone in your other hand, she opens the door when you knock and grabs the towel from your hand and slams the door.

You go back to the couch and continue doing your own business, she comes out of the bathroom and comes up to you with the towel covering her chest and says "Thanks, I guess." then she goes to her room.