To 3-bet not to 3-bet

[SGS]

Party Poker 5/10 Hold'em (6 max, 6 handed) pokerhand.org hand converter (http://www.pokerhand.org)

Preflop: Hero is CO with A/images/graemlins/diamond.gif, 9/images/graemlins/heart.gif.
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, SB calls, BB calls.

Flop: (6 SB) A/images/graemlins/spade.gif, 6/images/graemlins/diamond.gif, A/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, SB calls, BB folds.

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

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

SGS

[MyssGuy]

With no reads, I call. You've got an A and the board. You are getting 9:1 on the call (or more likely a chop).

[mute]

This sure looks like villain was waiting for the river to raise his A. Or he caught a straight or a boat along the way. Either way you are not likely to win more than half of this pot, so calling looks good.