AK gets minraised on river

[wodka]

Party Poker, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

SB: $27.35
BB: $52.34
Hero (UTG): $118.03
MP: $146.28
CO: $44.61
BTN: $49.25

Pre-Flop: K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $2</font>, MP folds, CO calls $2, 3 folds

Flop: ($4.75) 9[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $3.50</font>, CO calls $3.50

Turn: ($11.75) 7[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, CO checks

River: ($11.75) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $8</font>, <font color="red">CO raises to $16</font>, Hero calls $8

minraises on the river are rarely bluffs but can i fold TPTK getting this price? Bet turn? Appreciate your comments! Villain is 54/4/4 over a small samplesize of 60 hands.