But he can't be the only dealer around, right? I mean what Dalli said has some ground, unless it is somewhere mentioned that Vinny sells to PinkRose specifically. Quinn knew for a fact that Lily isn't just buying for herself, but did Lily mention buying from someone before that? I don't think Quinn knows all of Vinny's buyers.
Quinn knows. And it's explained between her and Tommy in a few scenes, and by Tommy himself, that Tania, I think her name was, and Lily bought from Vinny for a much higher price.
This all comes to head as the status quo is disrupted, and Quinn's robbery causes her to fall behind, and she falls out with Tommy. Tommy has fed her inside information that the strippers are buying super expensive from Vinny, and Quinn sees a potential to regain her lost money by undercutting Vinny. Given that Tommy refused to buy from Quinn and went back to Vinny, when they were angry at eachother, sort of tipped Vinny to the fact that Quinn stole his business(Maybe because Quinn didn't have enough drugs on hand to sell, and kept asking for more every time. So Vinny figured she had gotten a "big client" whilst he had just lost a "big client". But that is speculation.)
