J9d on a Turned Straight

Probably the biggest pot I've ever played. Here we go.

Party 100NL, 6-max. Hero is button with J[img]/images/graemlins/diamond.gif[/img]9[img]/images/graemlins/diamond.gif[/img], ~$220 behind.

Villain is early position. He is pretty loose pre flop, but not terrible (not that good, either), post flop. Villain has big stack of ~$380.

Pre-flop: UTG folds, villain raises to $3, MP calls, Hero calls, sb calls, bb calls.

Flop ($15): K[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img]
Hero leads for $10, MP folds, Hero calls, sb folds, bb folds.

Thinking villain may have flopped two pair here, I only called instead of raised, waiting to see what the turn gave me. Comments on this? Too weak-tight?

Turn ($35): T[img]/images/graemlins/spade.gif[/img]
Villain bets $20, Hero...?