400NL: AQo on SB, call the river?

[pottie]

Villain is playing very loose and aggressive preflop, 53/26 after 400 observed hands is the only read.

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

Button ($135)
Hero ($458.50)
BB ($501.90)
UTG ($369.40)
MP ($152.30)
CO ($283.20)

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img]. Hero posts a blind of $2.
<font color="#CC3333">UTG raises to $8</font>, <font color="#666666">1 fold</font>, CO calls $8, Button calls $8, Hero (poster) calls $6, BB calls $4.

Flop: ($40) Q[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets $30</font>, BB folds, UTG calls $30, CO folds, Button folds.

Turn: ($100) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, UTG checks.

River: ($100) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $80</font>, Hero ???

I shoudve blocked this river right?