What would you do?#115 - Facing big 3bet pre-flop with AKs

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 9 players
The Official DeucesCracked.com Hand History Converter

CO: $47.75
BTN: $174.75
SB: $24.50
BB: $80.65
UTG: $68.05
Hero (UTG+1): $60.85
UTG+2: $75.05
MP1: $46.45
MP2: $183.75 - 25/25 @ 4 hands... No other information.

Pre Flop: ($0.75) Hero is UTG+1 with Ah Kh
1 fold, Hero raises to $1.75, 2 folds, MP2 raises to $18, 4 folds, Hero requests TIME, 1 fold
WTF?  Is this stupid?  I figure, at minimum, I'm 50/50 with the raiser - but going from $1.75 to $18?!?!??!!?  WWYD?

Final Pot: $4.25
MP2 wins $4.25