KK faces preflop 4-bet and cold caller

[DoomSlice]

What's my next move? The cold caller worries me, he hasn't gotten out of line in the short time that I've been at the table. My thoughts were that I wanted to get as much money in the pot as possible against the cold caller in case Villain1 had AA, but I didn't even think about the possibility that Villain2 might be sandbagging AA.

Party Poker PL 25

Hero ($28) is MP with K [img]/images/graemlins/heart.gif[/img]K [img]/images/graemlins/diamond.gif[/img]
Villain1 ($11) is Button
Villain2 ($30) is UTG+1

Villain1 is VPIP 73% and PFR 15% after 54 hands
Villain2 is VPIP 30% and PFR 0% after 30 hands

UTG folds, Villain2 calls $.25, folds to Hero, Hero raises to $1, folds, Villain raises to $1.75, SB calls $1.65, BB calls $1.40, Villain2 calls $.75, Hero raises to $4, Villain1 raises to $7, SB/BB fold, Villain2 calls $5.25, Hero????