Role reversal

Villain (me) hasn't been at the table very long but has taken down a few small pots raising from the button and folded to a reraise preflop in the SB once. Seems fairly tight. What does Hero do?

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

Stack sizes:
UTG: $38.25
Villain: $55.45
Hero: $47.25
SB: $37.80
BB: $51

Pre-flop: (5 players) Hero is Button with K:heart: K:spade:
UTG folds, Villain calls, Hero raises to $2, SB calls, BB folds, Villain calls.

Flop: 9:spade: 7:spade: 7:heart: ($6.5, 3 players)
SB checks, Villain checks, Hero bets $4, SB folds, Villain calls.

Turn: J:diamond: ($14.5, 2 players)
Villain checks, Hero bets $6, Villain raises to $18, Hero ???

I'm inclined to fold, checkcall flop and checkraise turn by a tight player beats an overpair most of the time. With the limp prf a lot of hands are likely: T8, 67, 78, 79 etc.

Edit: didnt see that you bet so small on the turn - why did you do that? Villain might try to push you around here sensing weakness when seeing your weak turn bet, though I'm probably still folding here.

I would bet much bigger on the turn, somewhere near $10-15 and fold to a raise. By betting so small he could easily be raising a draw putting you on AK. I think a fold here is fine, or call his raise and fold to another bet on the river.

Call or reraise. This is a steal or they have a strong draw or a jack or another PP. I think you (they) are still good.