I need a plan - AA 200NL

[CryptoManiac]

SB has just sat down and this is his second hand so I have no read on him at all.

Whats my plan here?

Seat 1: UTG ($200.75 in chips)
Seat 2: CO ($255.50 in chips)
Seat 4: BTN ($81.75 in chips)
Seat 5: SB ($196 in chips)
Seat 6: BB ($57.88 in chips)
SB: posts small blind $1
BBs: posts big blind $2
----- HOLE CARDS -----
dealt to UTG [A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img]]
UTG: raises to $7
CO: folds
BTN: calls $7
SB: calls $6
BB: folds
----- FLOP ----- [5[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img]]
SB: bets $2
UTG: raises to $22
BTN: folds
SB: raises to $42
UTG: ???