PP 20/40 AK, standard iso or chip-spewing?

[FrankTheTank]

PP 20/40 7 handed. Just sat down ten hands ago and all I know is BB is on tilt.

Party Poker 20/40 Hold'em (6 handed) converter

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, Button calls, SB calls, <font color="#CC3333">BB 3-bets</font>, <font color="#CC3333">Hero caps</font>, Button calls, SB calls, BB calls.

Flop: (16 SB) 8[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">BB raises</font>, <font color="#CC3333">Hero 3-bets</font>, Button calls, SB folds, BB calls.

Turn: (13 BB) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, Button checks.

River: (13 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, Button folds, BB calls.

Final Pot: 17 BB

on the flop I figured BB oould have a very large range of hands, much of which I beat so I tried to isolate. Smart of just chip-spewing when SB leads into pf 3 better and capper? Does anyone bet the turn or just call river?