TPNK vs 3 flush on turn

[donger]

Just sat down, no reads on anybody. I'm curious about my play on the turn. I had planned to fold if CR'd by BB, otherwise I would take a free showdown if possible.

Party Poker 3/6 Hold'em (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is MP3 with 3/images/graemlins/spade.gif, Q/images/graemlins/heart.gif. Hero posts a blind of $3. CO posts a blind of $3.
<font color="#666666">4 folds</font>, Hero (poster) checks, CO (poster) checks, Button calls, SB completes, BB checks.

Flop: (5 SB) 2/images/graemlins/club.gif, J/images/graemlins/heart.gif, Q/images/graemlins/club.gif <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, CO folds, Button folds, SB calls, BB calls.

Turn: (5.50 BB) 7/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, SB calls, <font color="#CC3333">BB raises</font>, Hero folds, SB calls.

River: (10.50 BB) 6/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, SB calls.

Final Pot: 12.50 BB