Party Poker No-Limit Hold'em, $ BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($128.15)
BB ($42.30)
UTG ($197)
Hero ($197)
MP2 ($11.15)
CO ($200)
Button ($890.23)

Preflop: Hero is MP1 with K, K. SB posts a blind of $1.
[color:#666666]1 fold[/color], [color:#CC3333]Hero raises to $7[/color], [color:#666666]2 folds[/color], Button calls $7, [color:#666666]1 fold[/color], BB calls $5.

Flop: ($22) Q, 3, 6 [color:#0000FF](3 players)[/color]
BB checks, [color:#CC3333]Hero bets $18[/color], [color:#CC3333]Button raises to $36[/color], Hero calls $18.

Turn: ($94) 7 [color:#0000FF](3 players)[/color]
Hero ???

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Villian is 50/16/5.7 over a measly 12 hands.

BB is all-in on the flop (the Villian's raise covers him).

What's your move here on the turn?