In BB, 3-bet CO nit, monotone flop with nut flush draw + 2 overs

[Peoples Elbow]

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
5 players
Converter (http://www.neildewhurst.com/hand-converter)

Stack sizes:
UTG: $38.85
CO: $25
Button: $24.05
SB: $20.30
Hero: $48.45

Pre-flop: (5 players) Hero is BB with Q/images/graemlins/heart.gif A/images/graemlins/club.gif
UTG folds, <font color="#cc0000">CO raises to $0.75</font>, 2 folds, <font color="#cc0000">Hero raises to $2.5</font>, CO calls.

Flop: T/images/graemlins/club.gif 9/images/graemlins/club.gif 3/images/graemlins/club.gif ($5.1, 2 players)
<font color="#cc0000">Hero???

CO is just another 22/15 nit, only have about a hundred hands on him but so far, plays a standard nitty game. My image is a bit wreckless (I've been experimenting with playing 37/19 with very good results at this level).

What line do you take first to act given this flop?

*edited* consider I cbet 3/4 and am called. What's your line if

a) Turn is a blank
b) Turn hits me (A, Q or club)

[LateFlag]

Bet the pot and 3-bet AI if raised?

[Antinome]

You want to bet more on this flop than 3/4 pot for several reasons-

1. You want him to fold. Inasfar as increasing the bet increases fold equity, we should increase the bet.

2. Betting hard disguises the draw as a hand that wants protection.

[BoozeHound]

What hands call a 3/4 pot bet that don't call a full pot bet on this board. IMO, it's maybe a draw to a worse 4-flush, which we don't mind anyway.

[Antinome]

In my experience, people will often take one off with hands like 89o, A9, 77, 88, AK even on this flop if they think they detect weakness. Whether you vary your bet size or not, they will read the smaller bet as weaker than the bigger bet. That's what they do, after all.

[HoldEmNewby]

Pot the flop. 3bet all in on the flop if you can else you're leading on the turn large enough to put him/her all-in.