NL100 flopped straight on 3-flush board, limped pot

[Romanis]

Button is 30/5/3

Everest No-Limit Hold'em, $1 BB (6 handed)

Stack sizes all around 100$

Preflop: Hero is BB with J[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
3 limpers, SB calls, Hero checks.

Flop: ($5) 7[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, Hero bets $3.50, UTG folds, CO calls, Button calls, SB folds.

Turn: ($15.50) K[img]/images/graemlins/spade.gif[/img]
<font color="#0000FF">(3 players)</font>
Hero bets $9, CO folds, Button calls.

River: ($33.50) 2[img]/images/graemlins/heart.gif[/img]
<font color="#0000FF">(2 players)</font>
Hero checks, Button bets $33.50, Hero?

[K䲰䮥n]

I'd bet/fold this river.

[Upgrade_U]

Bet more on the flop and turn and b/f riv I guess