Dealt KK UTG. I limp. 1 limper plus the blind. no one raised

POT $12
FLOP
![The Jack of Diamonds [Jd]](https://www.pofex.com/images/smilies/Jd.gif)
I have no diamond. Checked to me..I bet $10. SB calls. BB raises to $40.
I folded. I figure I really can't put either of them on a hand. While I do have position, I could be dominated or up against a big draw. Your move?