I remember this fic that I read a long time ago, (it was incomplete when I last read it). Basically, Blaine and Kurt became step-brothers begrudgingly, (Kurt's mom and Blaine's dad got married). I'm pretty sure they lived in San Diego and Kurt had at least two, possibly three, younger sisters and a dog. Kurt was kind of an ass to Blaine at first and was bi, (he was in an on-again off-again relationship with Quinn). Also, at one point Kurt dies his hair black and red, and they go camping as a group trip thing with friends or something. I think they officially got together either during or right after an episode of "Queer as Folk" but I could be mixing stuff up.
Where I left off was after Kurt and Blaine had officially gotten together, but their parents still don't know. Does this sound familiar to anyone? I know I read it on fanfiction.net