400nl: bluff turns into trips

[ata]

Villain new to table, no read

SB: $698.20
Hero (BB): $400.00
UTG: $312.70
MP: $720.20
CO: $153.80
BTN: $452.60

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] (6 Players)
3 folds, <font color="red">BTN raises to $16.00</font>, SB folds, Hero calls $12.00

Flop: ($34) 9[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $16.00</font>, Hero calls $16.00

Turn: ($66) J[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $40.00</font>, BTN calls $40.00

River: ($146) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $140.00</font>

Comments on all streets appreciated.