KQs OOP against decent TAG

[jumbojacks]

UTG seemed pretty straightforward TAG. Haven't played against him too much. I'm sure he'll call down with a big hand. I'm not sure if he'll do the same with a worser hand. Should I block the river (though I'm always afraid I'll get bluff-raised and be put in an even tougher positions)?

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) internettexasholdem.com

SB ($24.55)
BB ($38.20)
Hero ($66.70)
MP ($100.95)
CO ($34.30)
Button ($72.90)

Preflop: Hero is UTG with Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $2</font>, <font color="#666666">2 folds</font>, Button calls $2, <font color="#666666">2 folds</font>.

Flop: ($4.75) K[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3</font>, Button calls $3.

Turn: ($10.75) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $7.5</font>, Button calls $7.50.

River: ($25.75) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $18</font>, Hero folds.

Final Pot: $43.75

[Imrahil]

I think villain may have AK here. Your fold is fine.

[thac]

I would check the turn for pot control. What are you beating that's gonna call? KT?

[Sir Winalot]

Your flop bet is weak sauce, bet more. Check turn. C/f river is goot IMO.

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Should I block the river (though I'm always afraid I'll get bluff-raised and be put in an even tougher positions)?

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Bluffed after showing strength preflop and on all 3 streets? Oh come on.