Pushing JJ pre-flop against two monkeys, 100NL

[ludo72]

MP is 50/20 after 50 hands, always opening for $4. BB is 54/15.

Not long ago MP raised pre-flop with 88, MP 3-bet to $12 with TT and MP min 4-bet him. BB pushed, got called and won the race. They both had close to full buy-in stacks when this happened. Considering this history, do you push or fold?

saw flop|<font color="#C00000">saw showdown</font>

Button ($97)
<font color="#C00000">Hero ($212.95)</font>
<font color="#C00000">BB ($36.76)</font>
UTG ($284.49)
<font color="#C00000">MP ($89.75)</font>

Preflop: Hero is SB with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img]. Hero posts a blind of $0.50.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $4</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero (poster) raises to $11.5</font>, BB calls $11, <font color="#CC3333">MP raises to $28</font>, Hero?