[50] AQ 3way line check

[ciro bonano]

No-Limit Hold'em, $0.50 BB (6 handed)

Button ($39.00)
SB ($26.57)
BB ($47.00)
Hero ($53.78)
MP ($37.10)
CO ($36.88)

Preflop: Hero is UTG with Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $1.75</font>, <font color="#666666">1 fold</font>, CO calls $1.75, <font color="#666666">2 folds</font>, BB calls $1.25.

Flop: ($5.50) 2[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $4</font>, CO calls $4, BB calls $4.

Turn: ($17.50) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $11</font>, CO calls $11, BB calls $11.

River: ($50.50) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, <font color="#CC3333">CO bets $20.13 (All-In)</font>, BB folds, Hero calls $20.13.

CO is 50 / 10 / 1.5 over ~40 hands, BB unknown. Should I have bet the river instead? Comments on all streets welcome.