oop w/ AK on dangerous board

[Colonial Bread]

only played a few hands at the table so no reads.

What is he betting the river that I am ahead of? Am I committed to call this because of my turn check?




Full Tilt No-Limit Hold'em, $0.10 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($10.60)
SB ($12.40)
Hero ($10.30)
UTG ($21.90)
MP ($9.75)
CO ($6.80)

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP calls $0.10, CO calls $0.10, <font color="#666666">1 fold</font>, SB completes, <font color="#CC3333">Hero raises to $0.75</font>, MP folds, CO folds, SB calls $0.55.

Flop: ($1.60) A[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $1.2</font>, SB calls $1.20.

Turn: ($4) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: ($4) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $4</font>, Hero...