brother and sister

Imagine Tony being your big brother and introducing you to the other Avengers. He’d be this kind of protective brother, making sure no one gets too close with his little baby sister.
“So, that’s my sister, Y/N. Beautiful little thing that she is, right? I will kill every single one of you who even thinks about her. Haha.. yeah.. no. Seriously, I’m not joking, go back to work, nothing to see here”