I can recall that Blaine didnt' grow up with Hiram, Leroy and Rachel and they didn't know he existed but something happened to Blaine's living situation I think and it meant that he had to go live with them. Blaine's a dick and even calls them "faggots".
And it's not Break by QueenSeer161
I've been looking for a while and if someone found it I would really appreciate it :)
I'm pretty sure it's Klaine!