Probably Boring, Possibly Interesting River Decision

[Stork]

Party Poker (6 max, 6 handed) converter

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].

I open raise one off the button. Button cold calls and the blinds tag along.

Flop: 3[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>

SB leads out. BB folds, I call, button folds.

Turn: Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB bets, I raise, SB calls.

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

SB bets.

Obviously I'm not folding the river, but do I have him quartered often enough to raise, or should I just call since there is a decent chance he has me quartered?