NL25SH JJ facing c/mr rrpot

[stever1k]

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($27.70)
MP ($30.20)
Hero ($26.95)
Button ($28.25)
SB ($28.65)
BB ($34.15)

Preflop: Hero is CO with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises to $0.75</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2.5</font>, <font color="#666666">3 folds</font>, UTG calls $1.75.

Flop: ($5.35) K[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $3.5</font>, <font color="#CC3333">UTG raises to $7</font>, Hero folds.

Is this fold standard? Villains plays 18/9/20 (VPIP/PFR/AF over 130 hands), Flop AF 13, turn and river infinite.

I do not like to check behind this flop, because I m giving away my hand, telling I have some hand which is beat by a pair of Kings :-(