Weird river check/raise

[sharpie]

32/12/3 19 wtsd over 65. This is never a bluff, at the same time that river card doesn't improve much, could he be waiting for a safe river with 2 pair or something, noone plays KQ like this, right?

PokerStars 5/10 Hold'em (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

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

Flop: (10 SB) Q[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG folds, MP calls, Button calls, <font color="#CC3333">SB raises</font>, Hero calls, MP calls, Button calls.

Turn: (9 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, MP folds, Button folds, SB calls.

River: (13 BB) 6[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>, Hero???