NL50: Flopped set. Protect vs slowplaying...

[AlexB182]

Villain is 78/3.5/.65 and bets virtually every time you check to him on flop and turn (Flop AF 4.1, Turn AF 2.5).
Due to his very high VPIP, he could show up with pretty much everything here. Of course I'm not afraid to be behind right now, but he could easily have 2 [img]/images/graemlins/heart.gif[/img] or something like T9 or 87 for OESDs.
So my question is now: is the c/r good here do deny him the odds to draw and to get the money in ASAP in case he continues or should we just VB every street here in case he got something like KQ, AQ, QJ which he might pay me off with...
All comments appreciated!
Plus: how is the size of the c/r?

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 9 Players
LegoPoker Hand History Converter

CO: $30.30
BTN: $59.25
SB: $47.50
BB: $43
UTG: $16.70
Hero (UTG+1): $82.85
UTG+2: $11.85
MP1: $90.45
MP2: $28.45

Pre-Flop: 9[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/heart.gif[/img] dealt to Hero (UTG+1)
UTG folds, <font color="red">Hero raises to $2</font>, UTG+2 folds, MP1 calls $2, 5 folds

Flop: ($4.75) Q[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">MP1 bets $4.75</font>, <font color="red">Hero raises to $13</font>