fill up on river but big allin

[leemur]

Poker Stars
No Limit Holdem Ring game
Blinds: $10/$20
8 players
Converter

Stack sizes:
UTG: $1365.50
UTG+1: $2000
MP1: $1900
hero: $4642
CO: $1970
Button: $310
SB: $3871
BB: $827.50

Pre-flop: (8 players) hero is MP2 with 9[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/diamond.gif[/img]
UTG calls, UTG+1 calls, MP1 folds, <font color="#cc0000">hero raises to $110</font>, 2 folds, SB calls, BB folds, UTG calls, UTG+1 calls.

Flop: 9[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] ($460, 4 players)
SB checks, UTG checks, <font color="#cc0000">UTG+1 bets $100</font>, <font color="#cc0000">hero raises to $500</font>, SB calls, 2 folds.

Turn: 2[img]/images/graemlins/spade.gif[/img] ($1560, 2 players)
SB checks, hero checks.

River: 2[img]/images/graemlins/club.gif[/img] ($1560, 2 players)
<font color="#cc0000">SB is all-in $3261</font>, hero ?