River decision w/ 99

[nut case ace]

This table had been pretty loose passive, but most of the fish lost their money so there are several new players, the two in this hand included. I feel like the hand was fairly straightforward the whole way until the SB woke up and fired out and there was still a player to act after me. Thanks!

Party Poker 10/20 Hold'em (10 handed) converter

Preflop: Hero is BB with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, MP3 calls, <font color="#666666">2 folds</font>, SB completes, <font color="#CC3333">Hero raises</font>, MP3 calls, SB calls.

Flop: (6 SB) 4[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP3 calls, SB calls.

Turn: (4.50 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP3 calls, SB calls.

River: (7.50 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero...