Turnded st8 vs rivered Flush?

[recallme]

Cryptologic
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $107
CO: $109.75
Button: $137.25
SB: $114.25
Hero: $158.99

Pre-flop: (5 players) Hero is BB with T[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/diamond.gif[/img]
UTG calls, 2 folds, SB calls, Hero checks.

Flop: J[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/heart.gif[/img] ($3, 3 players)
<font color="#cc0000">SB bets $3</font>, <font color="#cc0000">Hero raises to $12</font>, UTG folds, SB calls.

Turn: 8[img]/images/graemlins/heart.gif[/img] ($27, 2 players)
SB checks, <font color="#cc0000">Hero bets $17</font>, SB calls.

River: Q[img]/images/graemlins/spade.gif[/img] ($61, 2 players)
<font color="#cc0000">SB bets $42</font>,

I have no read and only beating a set or a total bluff.
You call/ push or fold that?