PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($117.90)
UTG ($99.50)
Hero ($117.95)
Button ($87.50)
SB ($137.50)

Preflop: Hero is MP with K, A.
UTG calls $1, Hero raises to $4, Button calls $4, 2 folds, UTG calls $3.

Flop: ($13.50) 5, 4, A (3 players)
UTG checks, Hero bets $8, Button calls $8, UTG calls $8.

Turn: ($37.50) 3 (3 players)
UTG checks,


Given flop action, is it likely that someone hit flush or does it make sense to keep betting? I've got a nice draw and tptk with that K spade, so should I just check and take the free one or is that reason to bet more?