River value bet OOP against aggressive villain?

[Aaron W.]

Villain is pretty new to the table, but he has already shown some aggressive tendencies. He was caught bluffing into another villain heads up when the other guy checked behind on the turn. He has also bet all three streets when he kept getting checked to (he won the hand).

We can debate the flop check-raise, too, but I'm mostly interested in your thoughts about the river play.

Paradise Poker 1/2 Hold'em (4 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG with 7[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#CC3333">Button 3-bets</font>, <font color="#666666">1 fold</font>, BB calls, Hero calls.

Flop: (9.50 SB) 3[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, <font color="#CC3333">Button bets</font>, BB folds, <font color="#CC3333">Hero raises</font>, Button calls.

Turn: (6.75 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, Button calls.

River: (8.75 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero...