RORY: What’s your name?
Clara (Scout Taylor-Compton) is Dean’s younger sister. Dean earlier alluded to having “sisters”, and Clara is one of them, although we never directly hear of any other. She seems to be around eight or nine years old, since she is still in the Brownies.
It is very strange that Rory has apparently never been to Dean’s house before, or met his family, even though they live in a small town and dated for several months. It’s even odder because Dean knows her mother very well, and visits her house often.
It makes her look like a detached and rather selfish girlfriend, that she expects Dean to always come to her, and to fit in with her life, rather than both of them making an effort. Or perhaps Dean has rather weirdly kept her away from his family, in which case she seems to have passively accepted it rather than argued against it.
Notice that the Forester’s front door has a friendly “Welcome” sign on the front door decorated with a red rose – a sure sign that Dean would welcome Rory’s visit, and her love, if only she knew.