QQ vs unknown villain. Whatdya do?

[jon_keck]

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is SB with Q[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#666666">2 folds</font>, MP1 calls, MP2 calls, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">BB 3-bets</font>, UTG calls, MP1 folds, MP2 calls, Hero calls.

Flop: (13 SB) 5[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, UTG calls, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">BB 3-bets</font>, UTG folds, MP2 calls, Hero calls.

Turn: (11.50 BB) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, MP2 calls, Hero calls.

River: (14.50 BB) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, MP2 folds, Hero calls.

Final Pot: 16.50 BB

I wimped out on the flop/turn due being 3-betted preflop and on the flop. My reasoning was that that much agro was a good sign of aa/kk. Is my thinking weak/tight or reasonable?