NL10: flop straight against lag, help extract

[drsmooth]

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.05/$0.10
6 players
Converter

Stack sizes:
UTG: $17.30
UTG+1: $4
CO: $8.65
hero: $8.25
SB: $6.85
BB: $13.05

Pre-flop: (6 players) hero is Button with 4[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
UTG calls, UTG+1 (poster) checks, CO folds, <font color="#cc0000">hero raises to $0.55</font>, SB calls, 3 folds.

Flop: 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img] ($1.4, 2 players)
<font color="#cc0000">SB bets $1</font>.


Same game as other thread, very loose. UTG was 75/29 after 60 hands. SB is 66/10/0.83. I raise becuase I was certain they would call, and pretty certain if I hit a flush, straight, 2 pair or wahtever I could stack one of them. I've hit my straight, been bet into. Now what?


edit: I guess more loose-passive than lag but whatever