Boring AA hand

Paradise $50 NL 5 handed. I have a tight-aggressive image if anyone was paying attention. Villian is somewhat loose but not a maniac.

Villian has about $45 and hero covers.

I am dealt AA in the BB. Villian opens UTG for $5 which is a good bit larger than his standard raise. I reraise to $15 and villian calls.

Flop is Ks 2s Kc. Hero checks, villian moves in for $25.

Hero?