AAxx river decision - PLO 100

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PokerStars Pot-Limit Omaha High, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($111.50)
Hero ($126.30)
CO ($105.50)
Button ($54)
SB ($23)
BB ($51.60)

Preflop: Hero is MP with 9[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, <font color="#CC3333">Hero raises to $4.5</font>, <font color="#666666">3 folds</font>, BB calls $3.50, UTG folds.

Flop: ($10.50) 2[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $10</font>, BB calls $10.

Turn: ($30.50) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($30.50) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $29</font>, Hero calls $29.

I felt pretty silly making this call here. But I really couldn't think of any hand that would be betting right here with confidence, outside of a turned flush.

A few things that make me think a call is good. The villian bought in short, and that usually means a poor player. Also, many players will bet less than pot with a set in this situation becaues they know that their hand will almost always be good, and they want to value bet two pair.

Anyway, alot of this post is just me talking to myself, but any thoughts?