NL50 AQo makes a str8 but gets raised on the river.

[JROK777]

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
5 players
Converter

Stack sizes:
Hero: $229.55
CO: $98.95
Button: $78.65
SB: $50.25
BB: $50.20

Pre-flop: (5 players) Hero is UTG with A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises to $2</font>, CO calls, 3 folds.

Flop: J[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] ($4.75, 2 players)
<font color="#cc0000">Hero bets $3.75</font>, CO calls.

Turn: T[img]/images/graemlins/heart.gif[/img] ($12.25, 2 players)
<font color="#cc0000">Hero bets $8</font>, CO calls.

River: 9[img]/images/graemlins/club.gif[/img] ($28.25, 2 players)
<font color="#cc0000">Hero bets $16.5</font>, <font color="#cc0000">CO raises to $50</font>, Hero folds.
Uncalled bets: $33.5 returned to CO.

Results:
Final pot: $61.25

Just making sure that this fold on the river is standard. Anyone play any streets differently?