Should I have slow played here?

Let me know how I played this hand.

I decided to slow play trips on the flop. Then I was re-raised on the turn. The player was fairly tight, so I wasnt sure if maybe he also had trips or better, yet wasnt sure if he necessarly had better trips. So I thought I ought to call him down. (I assumed FISHY had nothing relevant, he was involved frequently with small pairs and all sorts of below average hands)

Party Poker 2/4 Hold'em (7 handed) FTR converter on zerodivide.cx

Preflop: Hero is SB with 9[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
UTG calls, MP1 calls, MP2 :#A500AF(FISHY)/ calls, <font color="#666666">2 folds</font>, Hero completes, BB :#A500AF(TP)/ checks.

Flop: (5 SB) 9[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, TP checks, UTG checks, <font color="#CC3333">MP1 bets</font>, FISHY calls, Hero calls, TP calls, UTG folds.

Turn: (4.50 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, TP checks, MP1 checks, <font color="#CC3333">FISHY bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">TP 3-bets</font>, MP1 folds, FISHY calls, Hero calls.

River: (13.50 BB) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">TP bets</font>, FISHY calls, Hero calls.

Final Pot: 16.50 BB