3-bet this river?

[illegit]

UTG is extremely loose passive post-flop. Recently called a river bet with Q-high against me, and overcalled a river bet with NINE high in a 3-way pot I wasn't in. Either drunk or retarded, but is usually calling all over the place, rarely betting. Can i 3-bet on the end? Also i should have lead on the flop but the river is my concern here.

Party Poker 0.50/1 Hold'em (6 max, 6 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">UTG raises</font>, MP calls, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">UTG caps</font>, MP calls, Hero calls.

Flop: (12.50 SB) 5[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG bets</font>, MP folds, Hero calls.

Turn: (7.25 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, UTG calls.

River: (9.25 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG raises</font>, Hero calls

Results in white below: <font color="#FFFFFF">
Hero has Kd Ah (two pair, aces and kings).
UTG has 5c Ac (two pair, aces and fives).
Outcome: Hero wins 13.25 BB. </font>