live $1/2 KK heads up post-flop OOP

[obi_wang]

i never play no limit btw. i sat down to a $1/2 live game, with standard pf raises around $10. the game didn't seem too crazy or aggressive to me, but then again, this is only second time i've played nl live.

a couple players limp, button raises to $10. I am in SB with Kings and reraise to $35. Button thinks for a little bit and flat calls. everyone else folded. Button has about $55 left and i have him covered.

Flop: A Q 9

Hero ?

Versus virtual unkown, what is villain's range here? Is this an insta-push?