PokerStars No-Limit Hold'em, $2 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($217.70)
CO ($395.05)
Button ($192.75)
SB ($431.25)
BB ($281.40)
Hero ($203)

Preflop: Hero is UTG with K, K.
Hero raises to $8, MP calls $8, 4 folds.

Flop: ($19) 4, K, 5 (2 players)
Hero bets $12, MP calls $12.

Turn: ($43) 3 (2 players)
Hero bets $25, MP raises to $90, Hero ??