I screamed, "NO!" when I saw this flop after folding PF. I have UTG with a VPIP of 17% after 500+ hands with him, so there was no way I was calling PF.
"Whew!" is what i said when I saw that river card.
Ultimate Bet 30/60 Hold'em (5 handed)
converter
Preflop: Hero is BB with

,

.
UTG raises,
1 fold,
Button 3-bets,
2 folds,
UTG caps, Button calls.
Flop: (9.50 SB)

,

,
(2 players)
UTG bets, Button calls.
Turn: (5.75 BB)
(2 players)
UTG bets, Button calls.
River: (7.75 BB)
(2 players)
UTG bets,
Button raises,
UTG 3-bets,
Button caps, UTG calls.
Final Pot: 15.75 BB
Results in white below:
UTG has Kc Kd (straight, ace high).
Button has Ks 9h (straight, ace high).
Outcome: UTG wins 7.87 BB. Button wins 7.87 BB.