How are you doing at the tables (Poker Thread)?

Here is the Scenario......

Let's say you're under the gun at a 1/2 NL Hold'em table. You've stepped away from the table for second, dealer asks what you would like to do. You say call blind. Middle position and late position limp in... You get back to the table and find you're holding Js 3s

Flop is Ks 8s 2s

You check. Middle position bet's 8, button calls, you call.

Turn is a blank

You check again, Middle position bet's 15, button calls, you call.

River is a blank

You come out firing 40, middle position folds, button without much thought raises to 140.

What do you do?

After the look of surprise in your face...... Button shows you the 7s....

You try and get a read off of button with some banter... What do you do?