$0.25/$0.50 KQ TPGK getting action HU

[halpgr]

Villian had just sat down a couple of hands ago. His flop play surprised me and I found it difficult to put him on a hand consistent with his preflop play. I'd expect QQ-AA to 3bet preflop. AQ is a possibility as some won't 3bet this from the blinds. OESD seems unlikely. KQ or a weaker Q is also possible but is he capping the flop with less than KQ? 33 or 44 would also seem to make sense here. How's my line?

PokerStars 0.25/0.50 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG with K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">7 folds</font>, SB calls, <font color="#666666">1 fold</font>.

Flop: (5 SB) 3[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">SB caps</font>, Hero calls.

Turn: (6.50 BB) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

River: (8.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

Final Pot: 10.50 BB