2/5 NL 6 handed kings...welcome the reraise?

[technologic]

2/5 NL interpoker

i hold KK in the CO. button is a loose guy, will see any flop for almost any raise, and loves to pay off when he has a draw. i have around 270 behind at the beginning.

i raise to 20, button calls, sb raises to 70. i should call or reraise all in? both have me covered.