KK OOP vs. 2 players what to do???

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MP is a 20/6 player F/T/R AF of 2/1.3/1.8
BTN is 50/20 F/T/R AF of 3/1.7/2.43

I have only played about 20 hands at the table but my datamined stats are 23/19/3.4

Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 6 Players
http://www.legopoker.com/hh

BB: $200
Hero (UTG): $203
MP: $249.95
CO: $86.45
BTN: $300.95
SB: $269.30

Pre-Flop: Kd Kh dealt to Hero (UTG)
Hero raises to $7, MP calls $7, CO folds, BTN calls $7, 2 folds

Flop: ($24) 3c 5d Tc (3 Players)
Hero bets $20, MP calls $20, BTN raises to $80, Hero ???

Hero has $176 left and is covered by both players

MP called my bet quickly and BTN seemed to raise it up quickly also, like after 3 seconds of deliberation.