25NL: JJ Weird spot, botched hand

[Wondercall]

Both villains seem fairly solid, I had raised and taken blinds 3 or 4 hands in a row right before this. First raiser I think has to push AA or KK pf, SB post flop bet seemed really weak playing OOP into two players on a draw heavy board. Which street is misplayed worst here? Can I 4bet JJ here into two solid, tight players? Folding pf is really bad right?

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) internettexasholdem.com

MP ($21.25)
Button ($37.40)
SB ($24.55)
Hero ($57.50)
UTG ($27.05)

Preflop: Hero is BB with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $1</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to $3.5</font>, Hero calls $3.25, MP calls $2.50.

Flop: ($10.50) 8[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $6</font>, Hero calls $6, <font color="#CC3333">MP raises to $17.75</font>, SB folds, Hero calls $11.75.

Turn: ($52) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

River: ($52) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: