I think there are two issues here.

The first is that I do see Christie as judgemental and self-absorbed. The situation with Jodie today was typical. Instead of using her tools that she's always talking about to address a problem she had with Jodie taking charge, she sulked, she manipulated, and she tried to get the others to form a possee against Jodi. Now regardless of whether Jodi should have been more inclusive Christie needs to be older than a teenager and do something constructive. I'm sure had she asked one of the instructors would have let her do a project. It seemed as if she didn't necessarily want to do anything but also hated the fact Jodi did. Christie likes to get her jabs in but is afraid of what people will think of her.

However, the second issue regarding her brother is different. You can't help someone else if you aren't emotionally, physically, and financially prepared to do so. You can do more harm than good by trying and failing to help someone if you yourself aren't prepared to do it and aren't doing it for the right reasons. Sometimes it's more selfish to promise something, give someone false hope and then not be able to deliver. It's better to be honest and realize you can't do something and can't save someone than to screw up their lives even more by offering them a line and then letting it drop when you realize you can't hold up your end of the bargain. I've seen that happen to too many kids and it destroys them. If she can't be there for her brother, than she should be honest and admit it rather than screwing up his life even more.