Le Checkraise with KK

[parttimepro]

1/2 NL. Villain sat down a few hands ago. I have $200, he has $120.
I get KK in the SB. Two limpers, and villain raises to $5. Folded to me and I raise to $13. Everybody calls.

Pot is $50. Flop is 679 rainbow. I check, limpers check, and villain bets $12. I raise to $50. Limpers fold, villain calls.

So the pot is now $150, villain has $45 left. Turn is 8, completing rainbow and making a 4-straight. Hero..?

Two questions: Is this an autopush? And what do you put villain on?