HU NL100, bad turn

[Greg29]

Match just started, my initial read of the villain was that he was somewhat passive. What's your action on the turn ?

Full Tilt No-Limit Hold'em, $1 BB (2 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($123.30)
Button ($104.70)

Preflop: Hero is BB with 8, 7.
Button calls $0.50, Hero checks.

Flop: ($2) 9, J, T [color=#0000FF](2 players)</font>
[color=#CC3333]Hero bets $2</font>, [color=#CC3333]Button raises to $8</font>, [color=#CC3333]Hero raises to $28</font>, Button calls $18.

Turn: ($56) K [color=#0000FF](2 players)</font>
Hero ??