50NL; flop aces up in unraised pot; minraised on turn; overbet river

[Lego05]

Villian is 36/16/2.29

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($73.05)
Button ($14.95)
SB ($85.45)
Hero ($50)
UTG ($43.80)
MP ($54.15)

Preflop: Hero is BB with 5[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
UTG calls $0.50, MP calls $0.50, <font color="#666666">3 folds</font>, Hero checks.

Flop: ($1.75) A[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $1.5</font>, UTG calls $1.50, MP calls $1.50.

Turn: ($6.25) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $4</font>, <font color="#CC3333">UTG raises to $8</font>, MP folds, Hero calls $4.

River: ($22.25) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, UTG bets $25.5</font>, Hero ???

[Brettster]

As played, I fold. I might bet the river about $8 and fold to a raise.