NLCASH: Third nut flush OOP on fourflush

[Jiganti]

Villain has been aggro on early streets and preflop, not so much on the river I think though. He's a bit donkish, but plays fairly straightforward, with a little spontaneous play going on here and there. I'm thinking of donkbetting here, how does this sound? Or try to induce a bluff?

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

Hero (BB): $571.10
Villain (SB): $178.15

Preflop: Hero is dealt J[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Villain raises to $12.00</font>, <font color="red">Hero raises to $36.00</font>, Villain calls $24.00

Flop: ($72) 4[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, Villain checks

Turn: ($72) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">Villain bets $28.00</font>, Hero calls $28.00

River: ($128) 8[img]/images/graemlins/heart.gif[/img] (2 Players)