Need a line with JJ

[Oracle]

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO ($54.50)
Button ($66.90)
SB ($34.30)
BB ($45.75)
Hero ($52.10)
MP ($49.50)

Preflop: Hero is UTG with J, J.
Hero raises to $2</font>, 2 folds</font>, Button raises to $3.5</font>, 2 folds</font>, Hero calls $1.50.

Flop: ($7.75) 9, T, 3 2 players)</font>
Hero checks, Button bets $7</font>, Hero raises to $21</font>, Button calls $14.

Turn: ($49.75) 6 (2 players)</font>
Hero ??</font>

Need a line. Vill is unknown. Raise again preflop?