Prudent river action?

[baronzeus]

Villain fairly rockish but seems to steal a lot.

Party Poker 5/10 Hold'em (6 max, 6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is BB with Q/images/graemlins/heart.gif, Q/images/graemlins/diamond.gif.
<font color="#666666">4 folds</font>, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero 3-bets</font>, SB calls.

Flop: (6 SB) 4/images/graemlins/spade.gif, J/images/graemlins/heart.gif, 4/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

Turn: (4 BB) A/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

River: (6 BB) 8/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero ?????

[aK13]

I don't know why you would call the turn if you didn't expect to call the river.

I also call down very frequently in this spot.