Straight flush draw + top pair with one card to come

[xcrack999]

Villain in this hand is very loose. He has VPIP of 76 over about 50 hands, but he's been more passive than aggressive, and I haven't seen him make a big raise like this before. I thought he might have hit his two-pair, but he's also the type of player who would call a pot-size bet with gutshot straight draw, so I don't know. How about that turn bet? Is a check better? Comments very much appreciated.

Party Poker No-Limit Hold'em, $ Hero (6 max, 4 handed) converter

Button ($30.82)
SB ($20.2)
Hero ($23.8)
UTG ($44.36)

Preflop: Hero is BB with Q[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.1.
UTG calls $0.25, Button calls $0.25, SB (poster) completes, Hero checks.

Flop: ($1) 7[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets $1</font>, UTG calls $1, Button folds, SB folds.

Turn: ($3) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $2</font>, <font color="#CC3333">UTG raises to $15</font>, Hero folds.

Final Pot: $20