Why was her door unlocked? I don't know either, but seems it opened. She knows what you're looking at and is trying to keep a smile. Inside she is quite annoyed and wishes you'd just leave. Rooby isn't the kind that likes to show off her backside and especially dislikes it when others mention the size of it. So don't do that. Don't...I'm warning you! Stop thinking about it! Don't you open your mouth! AHHHHHHHHHHenjoy.