flopped top set facing a flush draw

[urbanati]

Would it be to fast to go all in on the flop? What do you think about the turn? Was it a bluff or not? What is your play? No reads, only few orbits with villain...
Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

MP ($160.52)
CO ($44.50)
Hero ($66.50)
SB ($50)
BB ($38.46)
UTG ($23.07)

Preflop: Hero is Button with T[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.25.
UTG calls $0.50, <font color="#CC3333">MP raises to $2</font>, <font color="#666666">1 fold</font>, Hero calls $2, SB (poster) calls $1.75, <font color="#666666">1 fold</font>, UTG calls $1.50.

Flop: ($8.50) 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, UTG checks, <font color="#CC3333">MP bets $4</font>, <font color="#CC3333">Hero raises to $15</font>, SB calls $15, UTG folds, MP folds.

Turn: ($42.50) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB calls $33 (All-In), Hero folds.

Final Pot: $75.50