50NL - How's my line with JJ?

[pfapfap]

I had been playing rather aggressively, but getting out with big betting unless showing down the winner. Of course, who knows who's paying attention to such things. I have no reads.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
9 players
Converter

Stack sizes:
Our Plucky Hero: $77.95
UTG+1: $58.45
MP1: $49.60
MP2: $44.80
MP3: $69
CO: $49.25
Button: $49.25
SB: $49.50
BB: $13.25

Pre-flop: (9 players) Our Plucky Hero is UTG with J[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Our Plucky Hero raises to $1.75</font>, 5 folds, Button calls, 2 folds.

Flop: 3[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] ($4.25, 2 players)
<font color="#cc0000">Our Plucky Hero bets $2.5</font>, <font color="#cc0000">Button raises to $7</font>, Our Plucky Hero calls.

Turn: 3[img]/images/graemlins/spade.gif[/img] ($18.25, 2 players)
Our Plucky Hero checks, <font color="#cc0000">Button bets $12</font>, <font color="#cc0000">Our Plucky Hero raises to $40</font>...

This puts villain all-in by a few bucks. I figure if I'm coming this far I'm planning on calling the last $24 on the river, so this may get some better hands to fold. Good thinking? Fold long ago?