Numb3rs Fanfic Finders

I'm going to start us off with a request I received off-list, and to my eternal shame I could not help her! So, here's hoping one of you can. *g*

hi, i was wondering if you could help me, i read a charlie/don slash fic a coupla months ago and have been trying to find it again, but for the life of me i cant remember the name! its basically about them when they were kids and stuff, and dons perspective- anyway at some point during it, charlie finds teenage don having sex with his gf in his room, then later that night sorta comes to him, and don kinda helps him ahem well jack off, to use a less than mature phrase. they drift apart and then don comes back and i cant remember what happens. it was a really good fic, written really well, and i was wondering if maybe you could help me locate it? id be very grateful, thank you for your time,