100NL What do we do on this flop bet into with QQ

[scatt_man]

No read on either villain

Full Tilt Poker, $0.50/$1 NL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

SB: $82.40
BB: $196.30
UTG: $78.25
CO: $85.45
Hero (BTN): $152.05

Pre-Flop: Q[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img] dealt to Hero (BTN)
UTG folds, CO calls $1, <font color="red">Hero raises to $4.50</font>, SB folds, BB calls $3.50, CO calls $3.50

Flop: ($14) 6[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, <font color="red">CO bets $14</font>,Hero?