Button's response to my play: "that was ridiculous...how can you call 4 bucks on a flushing board on a gutshot...lucky for you stupidity pays"

PokerStars 1/2 Hold'em (10 handed)

Preflop: Hero is SB with , .
UTG calls, 2 folds, MP1 calls, 2 folds, CO calls, Button calls, Hero completes, BB checks.

Flop: (6 SB) , , (6 players)
Hero bets, BB folds, UTG calls, MP1 folds, CO folds, Button calls.

Turn: (4.50 BB) (3 players)
Hero checks, UTG bets, Button raises, Hero calls, UTG 3-bets, Button calls, Hero calls.

River: (13.50 BB) (3 players)
Hero bets, UTG calls $1 (All-In), Button calls.

Final Pot: 16 BB

Results in white below:
Hero has 5d 9d (straight, seven high).
UTG has Kd Ac (one pair, aces).
Button has Ad 6d (two pair, aces and sixes).
Outcome: Hero wins 16 BB.

Two words for ya norton:

En Aitch.

Three more words:

Vee En Aitch.

Real bad call--glad it worked out for you though! Funny part is that you weren't in real bad shape until the turn card.

Pre-Flop:
Hero ([9d] ): 30.2%
UTG ([Ac] ): 49.9%
Button ([Ad] ): 20.0%

Flop:
Hero: 41.0%
UTG: 11.4%
Button: 47.6%

Turn:
Hero: 19.0%
UTG: 14.3%
Button: 66.7%

You had a double gutshow for 8 outs at this point, but 2 of them (the spades) could have given an opponent the flush, so you had 6 effective outs, with 46 unseen cards...6.67-to-1 odds to hit the nuts.

Your first call on the turn only yielded you 3.75-to-1. That was the bad call. The last call was giving you 12.5-to-1, besides the fact that you already had invested 2 BB at that point, what's a third?

Like I said, glad you won the hand!