Okay, so I found this anon. request in the PuckKurt community and it mentioned two fics. One PR which I know and have read and a PQ one that I'm not familiar with.
The request:
So there have been a couple of fics with Puck's sister in them but what about one where it turns out Puck is a really great older brother to his sister? There is a P/R fic like this where is mom is dying of cancer and so he has to take care of his little sister, and an amazing P/Q one where Pucks mom is an alcoholic and Puck takes care of his sister in her absence but of course a more Puck/Kurt kinda version would be awesome. The bolded part is obviously the PQ fic I'm in search of. I've never read the fic before, though, so if you have any that fit that bill or is that fic itself, it would be great!
Thanks in advance!
ETA - A link has been provided, but since I haven't read the fic I'm searching for before, I'm not entirely sure if the one given is the right one or if it just has the same kind of storyline. If any of you know a fic that has that kind of storyline or could possibly be it, I'd love a link!
Here's the link of the fic I was given:
http://www.fanfiction.net/s/5628767/1/Cheated_Hearts