Top two pair on 6 player flop

[Haplo]

Villain had seemed quiet but was actually loose (37 vpip but in only 40 hands though) (and made a substantial bluff 5 hands later it turned out): The one other time I remember seeing the villain rz the size of the pot on the turn was when she had the nuts.

Villain: 37$
Hero: 71$

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
9 players
Converter

Pre-flop: (9 players) Hero is BB with 9[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img]
UTG calls, UTG+1 calls, 3 folds, CO (poster) checks, Button calls, SB calls, Hero (poster) checks.

Flop: 9[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] ($3, 6 players)
SB checks, <font color="#cc0000">Hero bets $2</font>, UTG calls, 4 folds.

Turn: K[img]/images/graemlins/spade.gif[/img] ($7, 2 players)
<font color="#cc0000">Hero bets $4.2</font>, <font color="#cc0000">UTG raises to $11</font>, Hero ?????

What is your action here? Thanks.