PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 ($42.45)
MP1 ($126.90)
MP2 ($78.90)
MP3 ($101.50)
Hero ($98.50)
Button ($163.55)
SB ($99)
BB ($120.45)
UTG ($146.40)

Preflop: Hero is CO with Q, K.
2 folds, MP1 calls $1, MP2 calls $1, 1 fold, Hero calls $1, 1 fold, SB completes, BB checks.

Flop: ($5) K, K, 3 (5 players)
SB checks, BB checks, MP1 checks, MP2 checks, Hero bets $4, SB folds, BB folds, MP1 folds, MP2 raises to $12, Hero ???

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Villian was 70/4/1.12 over only about 40 hands.

What's your play here?