JJ against unknown, play for stacks?

[LOwrestling2001]

No reads on villain except that he is involved in alot of pots, calls a lot of raises preflop, IP and OOP, not sure on aggression though. is turn a shove or fold?
PokerStars No-Limit Hold'em, $1.00 BB (4 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($286.85)
Hero ($117.95)
Button ($108.40)
SB ($220.70)

Preflop: Hero is UTG with J[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $4</font>, <font color="#666666">2 folds</font>, BB calls $3.

Flop: ($8.50) 6[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $7</font>, <font color="#CC3333">BB raises to $21</font>, Hero calls $14.

Turn: ($50.50) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $25</font>, <font color="#CC3333">Hero??