SH NL25, JJ OOP vs Unknown

[StyloAl]

Party Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is UTG with :js :jh
Hero raises to $1, 2 folds, Button calls, 2 folds.

Flop: :3h :2d :4d ($2.35, 2 players)
Hero bets $2, Button calls.

Turn: :kh ($6.35, 2 players)
[color=#cc0000]Hero??