villain is 17-15 and i've 3-bet him twice in the last two orbits, he's folded so far. This time I seriously considered flatting, but nah...
should i fire a turn xecond barrel or think about pot control?
as played I debated the river a while...

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

MP3 ($7.75)
CO ($51)
Hero (Button) ($55.15)
SB ($49.50)
BB ($94.45)
UTG ($9.25)
UTG+1 ($51.50)
MP1 ($50)
MP2 ($74.85)

Preflop: Hero is Button with Q Q
5 folds, CO raises to $1.75, Hero raises to $5, 2 folds, CO calls $3.25

Flop: ($10.75) K 4 9 (2 players)
CO checks, Hero bets $7.50, CO calls $7.50

Turn: ($25.75) K (2 players)
CO checks, Hero checks

River: ($25.75) 6 (2 players)
CO bets $16,