Weak overpait on turn on 3 flush board...

[pofigistka]

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $106.38
BB: $100.00
UTG: $73.40
MP: $129.10
CO: $98.50
Hero (BTN): $165.50

Preflop: Hero is dealt 8[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG folds, MP calls $1.00, CO folds, <font color="red">Hero raises to $4.50</font>, SB folds, BB calls $3.50, MP calls $3.50

Flop: ($14) 3[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (3 Players)
BB checks, MP checks, <font color="red">Hero bets $10.50</font>, BB calls $10.50, MP calls $10.50

Turn: ($45.50) 6[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, MP checks

Pot Size: $45.50

BB is 20/14 taggish and MP is what we play party for a solid 44/4. I think he will call this turn with a bare flush draw. Who bets/checks here, and how much if so?