If I tell you which one it is, do I get a fic?

just kidding, it's "These Are The Words I Never Said (this is the fear)"

At first, it concerned him how easily Neal could get cash – but eventually he confessed that the money was obtained legitimately - playing in poker cash games, backgammon tournaments, and lately he’s developed a real talent for picking stocks (often much better than most Wall Street pundits). Which always drives Peter crazy. Neal could have been, no - he should have been - a force to be reckoned with, instead of a reformed felon.