I have a TAggy image right now. Villian has semi tight image, with nothing out of line. I flop nut flush in position, is this too passive or should I just keep letting the guy bet into me? I didn't like the paired board on the turn so I slowed down and didn't raise. Bad move?

Game #2482952894: Hold'em NL ($0.25/$0.50) - 2006/05/24 - 13:31:04 (ET)
Table "Lundu" Seat 6 is the button.
Seat 1: kirank86 ($74.49 in chips)
Seat 2: Handcuff ($43.50 in chips)
Seat 3: RumRunne ($42.15 in chips)
Seat 4: PassDSuga ($50.10 in chips)
Seat 5: lorensu_X ($29.59 in chips)
Seat 6: colm ($76.74 in chips)
kirank86: posts small blind $0.25
Handcuff: posts big blind $0.50
----- HOLE CARDS -----
dealt to PassDSuga [Ah 7h]
RumRunne: calls $0.50
PassDSuga: raises to $1.50
lorensu_X: folds
colm: folds
kirank86: folds
Handcuff: folds
RumRunne: calls $1
----- FLOP ----- [Kh 3h Qh]
RumRunne: bets $2
PassDSuga: calls $2
----- TURN ----- [Kh 3h Qh][Kd]
RumRunne: bets $6.50
PassDSuga: calls $6.50 RAISE?
----- RIVER ----- [Kh 3h Qh Kd][3s]
RumRunne: bets $8
PassDSuga: folds