If you had the flush, would you have made that bet?

Party Poker No-Limit Hold'em, $ Hero (6 max, 6 handed)

saw flop|saw showdown

Hero ($65.90)
UTG ($58.27)
MP ($40.70)
CO ($97.80)
Button ($49.69)
SB ($17.61)

Preflop: Hero is BB with , . SB posts a blind of $0.25.
1 fold, MP raises to $1, 1 fold, Button calls $1, SB (poster) calls $0.75, Hero calls $0.50.

Flop: ($4) , , (4 players)
SB checks, Hero checks, MP checks, Button bets $10, SB folds, Hero calls $10, MP folds.

Turn: ($24) (2 players)
Hero checks, Button bets $10, Hero raises to $20

Final Pot: $54

Results in white below:
No showdown. Hero wins $54.

It's a great raise with such a scary board and another legit scare card on the turn.

I would make it to $25 or $30 though... don't make it so small that he'll be inticed to call.

agree with kenny. nice read but he could be betting that with Ks and you don't want him drawing against you. I wouldn't make this play unless you know you can make him fold on the turn often.