nut flush on paired river

[ScottySo]

my friend played this hand and I want to see what people think of it. what do you do on this river?

Full Tilt Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 9 Players - (LegoPoker Hand History Converter)

Hero (SB): $198.00
BB: $174.40
UTG: $342.00
UTG+1: $572.60
MP1: $205.60
MP2: $209.00
MP3: $225.75
CO: $193.05
BTN: $81.80

Preflop: Hero is dealt Q[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (9 Players)
UTG calls $2.00, 3 folds, MP3 calls $2.00, 2 folds, <font color="red">Hero raises to $11.00</font>, BB folds, <font color="red">UTG raises to $30.00</font>, MP3 folds, Hero calls $19.00

Flop: ($64) 7[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, UTG checks

Turn: ($64) 2[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, UTG checks

River: ($64) J[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $42.00</font>, <font color="red">UTG raises all-in to $312.00</font>, Hero calls all-in for $126.00
Uncalled bet of $144.00 returned to UTG

Pot Size: $400.00 ($3 Rake)

UTG had K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (a full house, Kings full of Twos) and WON (+$199.00)
Hero had Q[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (a flush, Ace high) and LOST (-$198.00)