Should I be betting this turn?

No reads, second hand at the table

Absolute .5/1 6max

Hero is BB A [img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img]

Preflop:
UTG calls, folds, CO calls, folds, SB completes, Hero checks

Flop: 4SB
5 [img]/images/graemlins/heart.gif[/img]2 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/spade.gif[/img]'

SB checks, Hero bets, UTG raises, CO folds, SB folds, Hero raises, UTG caps, Hero calls

Turn:6BB
A [img]/images/graemlins/heart.gif[/img]

Hero checks, UTG checks

River: 6BB
K [img]/images/graemlins/heart.gif[/img]
Hero bets, UTG calls


What do you guys think of my line? Should I have raised the turn?