AQ in reraised pot facing river all in

[Burcak]

PokerStars $0.25/$0.50 No-Limit Hold'em - 5 players
Hand Converter Tool from DeucesCracked.com

Button: $101.50
SB: $53.70
BB: $25.00
UTG: $36.50
CO: $77.40

Preflop: Hero is Button with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img]
UTG folds, <font color="#FF0000">CO raises to $1.50</font>, <font color="#FF0000">Hero raises to $5</font>, SB folds, BB folds, CO calls $3.50.

Flop: ($10.75) A[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, <font color="#FF0000">Hero bets $7.50</font>, CO calls $7.50.

Turn: ($25.75) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, <font color="#FF0000">Hero bets $17</font>, CO calls $17.

River: ($59.75) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#FF0000">CO bets $47.90 (all in)</font>, Hero ???.

Final Pot: $59.75

Villain is 53/20/1.4 over 50 hands.

I know all I can beat is a bluff, then again, I feel folding after checking against what seems to be a donk is kinda weak.

Thoughts on all streets?