AA facing large bet on river

[mongoose51]

Live 2-5 blind Pot Limit. Ten players.

BB and CO are Loose and will call flop and turn with draws and many weak 1 pair hands. Both like to see flop with any suited, and most any connectors. I haven't seen BB bluff very often.

My image is TAG. I have played with CO 8 or 10 times. First time with MP.

BB $350
MP $500
Hero $280

PF: MP call $5, Hero A [img]/images/graemlins/diamond.gif[/img] A [img]/images/graemlins/heart.gif[/img] raises to $25, fold to BB calls $20, fold to MP who calls the raise.

Flop: [$60] 5 [img]/images/graemlins/club.gif[/img], 7 [img]/images/graemlins/club.gif[/img], 8 [img]/images/graemlins/diamond.gif[/img] , BB check , MP check , Hero bets $50, , BB calls, MP calls.

Turn: [$210] K [img]/images/graemlins/heart.gif[/img] , BB check, Hero bet $70, CO calls, BB calls.

River: [$420] 2 [img]/images/graemlins/club.gif[/img] , BB bets $150, MP folds, Hero ???

I think it is obvious that I should have bet more on the turn. I gave the draws a cheap shot at the pot on the turn.

Comments on all streets please.