KK with 2 Aces on the flop

[jah0550]

Last night on Party, $10-10 handed. Blinds are t30. Hero has 800 and villian has 1000. Villian limps UTG+2. Everyone folds to hero holding K [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/heart.gif[/img]. Hero raises to 120. The rest fold to the villian, who calls.
Flop
10 [img]/images/graemlins/heart.gif[/img]A [img]/images/graemlins/diamond.gif[/img]A [img]/images/graemlins/heart.gif[/img]
Villian checks, what should hero bet here, if anything?