QQ -- too passive after flop?

[prayformojo]

CO is new to the table, so no idea of his style of play.

PokerStars 0.05/0.10 Hold'em (9 handed)

Preflop: Hero is MP3 with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img]. CO posts a blind of $0.05.
UTG calls, UTG+1 calls, MP1 calls, MP2 calls, Hero raises, CO (poster) calls, <font color="666666">1 fold</font>, SB calls, BB calls, UTG calls, UTG+1 folds, MP1 calls, MP2 calls.

Flop: (15 SB) T[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="blue">(7 players)</font>
SB checks, BB checks, UTG checks, MP1 checks, MP2 checks, Hero bets, CO raises, SB folds, BB folds, UTG calls, MP1 calls, MP2 calls, Hero 3-bets, CO caps, UTG calls, MP1 calls, MP2 calls, Hero calls.

I believe the 3-bet was obvious here, since I have CO most likely on a pair of Jacks, but correct me if I'm wrong. When he caps, I up him to a possible two pair or a very aggressive nut flush draw.

Turn: (17.50 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="blue">(5 players)</font>
UTG checks, MP1 checks, MP2 checks, Hero checks, CO bets, UTG calls, MP1 calls, MP2 calls, Hero calls.

River: (22.50 BB) 4[img]/images/graemlins/diamond.gif[/img] <font color="blue">(5 players)</font>
UTG checks, MP1 checks, MP2 checks, Hero checks, CO bets, UTG calls, MP1 folds, MP2 calls, Hero calls.

Final Pot: 26.50 BB

Results in white below: <font color="white">
UTG shows Qs Js (one pair, jacks).
MP2 shows Kh 4s (one pair, fours).
Hero shows Qh Qc (one pair, queens).
CO shows Kd Jc (one pair, jacks).
Outcome: Hero wins 26.50 BB. </font>

So tell me, is this a passive leak? Should I have bet out against an opp who capped on the flop in the face of a pre-flop raise and flop 3-bet?