Party Poker No-Limit Hold'em, $ BB (10 handed) FTR converter on zerodivide.cx

BB ($159.59)
Hero ($99)
UTG+1 ($127.03)
UTG+2 ($88.85)
MP1 ($72.03)
MP2 ($102.50)
MP3 ($40)
CO ($50)
Button ($98.50)
SB ($102.15)

Preflop: Hero is UTG with K, Q. MP3 posts a blind of $1. CO posts a blind of $1. SB posts a blind of $0.50.
Hero raises to $4, 1 fold, UTG+2 calls $4, 2 folds, MP3 (poster) calls $3, 3 folds, BB calls $3.

Flop: ($17.50) 4, K, K (4 players)
BB checks, Hero bets $12, UTG+2 calls $12, MP3 folds, BB folds.

Turn: ($41.50) 3 (2 players)
Hero ????

What's my play here?