Flopped flush called down..4 flush river...call?

[halperin]

Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $402.00
Hero (BB): $584.60
UTG: $476.80
MP: $578.40
CO: $888.80
BTN: $244.30

Preflop: Hero is dealt J[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG calls $4.00, MP calls $4.00, 3 folds, Hero checks

Flop: ($14) 5[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">Hero bets $10.00</font>, UTG calls $10.00, MP calls $10.00

Turn: ($44) A[img]/images/graemlins/club.gif[/img] (3 Players)
<font color="red">Hero bets $36.00</font>, UTG folds, MP calls $36.00

River: ($116) 9[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, <font color="red">MP bets $54.00