I am almost positive that Del Kathryn Barton went to the same High School as me back in the day... I know one of the recent Archibald winners did :S Just an anecdote lol.
As for your question, I think it's important to have your own perspective and not to get it spoon fed to you. Visual texts are meant to be responded to in a variety of ways, all of which can be argued. Figure out what the text says to you about the idea of belonging to a family. What are the productive elements of such a connection? What are the counterproductive elements of such a connection? There are so many different ways those questions can be answered, and as long as you can effectively identify and explain those answers in a response, you will undoubtedly do well.
Make sure you look at both the positive and negative effects of family connection as most people will only look at the positive side.