200 NL: overcall an overbet on the river with a flush?

[bigkawik]

Dealer: You have been dealt [4h Th]
Dealer: ArtieRufio31 folds
Dealer: ImTiffany folds
Dealer: papapelto calls $2
Dealer: MightyAce folds
Dealer: Nut-No-Par folds
Dealer: huntfourever calls $2
Dealer: TakeUonDaRvr raises to $4
Dealer: HERO calls $2
Dealer: papapelto calls $2
Dealer: huntfourever calls $2
Dealer: The flop is [6h 4d 3s]
Dealer: TakeUonDaRvr checks
Dealer: HERO checks
Dealer: papapelto bets $2
Dealer: huntfourever calls $2
Dealer: TakeUonDaRvr calls $2
Dealer: HERO calls $2
Dealer: The turn is [9h]
Dealer: TakeUonDaRvr checks
Dealer: HERO checks
Dealer: papapelto checks
Dealer: huntfourever bets $25
Dealer: TakeUonDaRvr has 15 seconds left to act
Dealer: TakeUonDaRvr folds
Dealer: HERO calls $25
Dealer: papapelto calls $25
Dealer: The river is [2h]
Dealer: HERO checks
Dealer: papapelto bets $122
Dealer: huntfourever has 15 seconds left to act
Dealer: huntfourever calls $122
Dealer: HERO has 15 seconds left to act

The 3 players in this hand have all been playing very donkyish to me and seem to be weak players based on previous hands (showing down and playing doodoo cards). I figure I'll just take a flop for half price and see if i can hit it hard. i called 2 on the flop. why not. its cheap. 25 on the turn was kinda loose i think. now theres 96 dollars in the pot. I make my flush on the river and decide to check and trap my opponents. But now the guy overbets the pot and bets 122! Then someone else calls this overbet! Im not too worried about the player who just called, it seems to me that he has a straight. But what about the initial bettor? What is my play? Results in white:

<font color="white">Dealer: HERO calls $122
Dealer: papapelto shows a straight, Six high
Dealer: huntfourever mucks
Dealer: HERO shows a flush, Ten high
Dealer: HERO wins the pot ($462) with a flush, Ten high

Papapelto had K5
Huntfourever had K9!!!!! </font>