Need help on ALL streets except preflop (I think)

[King_J]

6 handed online 10-20. A bad player open-limps from cutoff and I raise with
A [img]/images/graemlins/heart.gif[/img]9 [img]/images/graemlins/heart.gif[/img] Small blind makes it 3 bets and that means a good hand. Dont know exactly his standards unfortunately.

bb folds, cutoff calls two bets and i call.
3 to the flop for 3 bets each.

Flop: K [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] 7 [img]/images/graemlins/club.gif[/img]

Sb bets, cutoff calls and so do I.

Turn 8 [img]/images/graemlins/spade.gif[/img]
I am ready to give up when small blind check. Cutoff also checks and I start to think that small blind easily could have AQ, AJ and I decide to take a shot at the pot and I bet.

They both call and I think that SB could have TT or JJ.
I have no idea what cutoff might have but I dont bother much either. He could have any kind of draw.

River: 9 [img]/images/graemlins/spade.gif[/img]

They check to me and I check.

Fire it off!!