Two pair on board, facing river bet

[SuperUberBob]

Got right at this table and ran real cold. Villain caps and 3-bets light, but otherwise no real read here.

PokerStars 0.50/1.00 Hold'em (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG with Q[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises</font>, Button calls, SB calls, BB calls.

Flop: (8 SB) J[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, Hero calls, Button calls.

Turn: (6 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, <font color="#CC3333">Hero raises</font>, Button folds, SB calls.

River: (10 BB) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero ??.

Final Pot: 10 BB

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Other than a bluff, what else is villain betting here that I have beat?