200NL KK overpair vs flop donk bet, turn check

[Halv]

Villain is ~30/0/0.5 over ~25 hands, no read.

How do you like the smooth call on the flop, and how much do you bet (or check behind?) on the turn?

Party Poker No-Limit Hold'em, $2 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

CO ($229.62)
Hero ($342.70)
SB ($303.05)
BB ($98)
UTG ($230.91)
UTG+1 ($96.35)
UTG+2 ($262.50)
MP1 ($41.61)
MP2 ($140.35)
MP3 ($277.67)

Preflop: Hero is Button with , . SB posts a blind of $1.
3 folds, MP1 raises to $4, 2 folds, CO calls $4, Hero raises to $16, 2 folds, MP1 folds, CO calls $12.

Flop: ($39) , , (2 players)
CO bets $30, Hero calls $30.

Turn: ($99) (2 players)
CO checks, hero ??

[AHiltz]

Could be AQ trying to push you off the flop. If he's X/0/0.5 he's prob not going to fire anymore, so bet for value.

[Fnord]

$60, our hand isn't strong enough here to screw around. With Aces I might show him a river.

[freechus9]

Check behind for pot control, call a reasonable bet on the river, bet half pot if checked to.