NL100 turn play with combo draw

[xeanatic]

Villian is 20/18/4 over a small sample I 3betted him once and he folded on the flop. That's the only history

Do i check behind here for the free card or is a semi bluff best here?

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

Hero (MP): $100
CO: $197.60
BTN: $71.60
SB: $99.95
BB: $187
UTG: $100.15

Pre-Flop: T[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/spade.gif[/img] dealt to Hero (MP)
UTG folds, <font color="red">Hero raises to $4</font>, 3 folds, BB calls $3

Flop: ($8.50) A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $7</font>, BB calls $7

Turn: ($22.50) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $18</font>

[Jamougha]

Definite bet to fold out Kx.

[traz]

yea i barrel

[ikestoys]

prepare barrel three.

[the machine]

im always betting this turn with AQ.