you being robins younger sibling means..well, he's protective, and you're pretty well known

you were sitting in the living room when he came in from school, you stayed home due to being sick.

once he entered, he heard your parents arguing over what seemed to be..you and the fact your dad had to stay home and help take care of you

You being sick and all you've been on the couch, sweating, coughing, and sneezing all day with a high fever

Robin sighed and comes over to you and helped you up; "go to your room, I'll be there soon, okay ?"