I think fold is ok, what about pre raise size?
Hand converted with online PokerStrategy.com hand converter:
$0.1/$0.25 No-Limit Hold'em (9 handed)
Known players:
[tg]CO$27.98:///////;BU$25.00:///////;SB (Hero)$31.04:///////;BB$25.00:///////;UTG1$11.46:///////;UTG2$27.70:///////;MP1$32.97:///////;MP2$46.00:///////;MP3$15.31:///////;[/tg]
Preflop: Hero is SB with K:c, K:h.
2 folds, MP1 raises to $0.75, MP2 raises to $2.35, MP3 folds, CO calls $2.35, BU folds, Hero raises to $6.50, 3 folds, CO calls $4.15.
Flop: ($16.35) A:h, 7:d, T:h (2 players)
Hero bets $6.75, CO raises to $21.48, Hero folds, CO gets uncalled bet back.
Final Pot: $23.1.