confusing river

[wall_st]

SB is really bad in a laggish way. No reads on BB, new to table, I usually fold A9s from this position however table had been very passive and predictable pre flop.

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) FTR converter on zerodivide.cx

Hero ($113.35)
CO ($95.90)
Button ($34.05)
SB ($33)
BB ($56)
UTG ($32.10)

Preflop: Hero is MP with 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
[color=#666666]1 fold</font>, Hero calls $1, CO calls $1, Button calls $1, SB completes, BB checks.

Flop: ($5) 4[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/club.gif[/img] [color=#0000FF](5 players)</font>
SB checks, [color=#CC3333]BB bets $2</font>, [color=#CC3333]Hero raises to $6</font>, CO folds, Button folds, SB calls $6, BB calls $4.

Turn: ($23) 5[img]/images/graemlins/spade.gif[/img] [color=#0000FF](3 players)</font>
SB checks, BB checks, Hero checks.

River: ($23) A[img]/images/graemlins/heart.gif[/img] [color=#0000FF](3 players)</font>
[color=#CC3333]SB bets $26 (All-In)</font>, BB calls $26, Hero ?.

Final Pot: $75