KK on A-high flop OOP (25NL)

Is it ok to just check-fold here? It seems like any good opp could reasonably expect that we would beat on that drawy type of board with Ax hands.

Opp seemed reasonable over a small sample, running at 19/19/inf over 26 hands.

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

CO ($30.30)
Button ($16.45)
Hero (SB) ($26.55)
BB ($5)
UTG ($25.70)
MP ($25.10)

Preflop: Hero is SB with Khttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Khttp://www.flopturnriver.com/phpBB2/...iles/heart.gif
UTG bets $0.75, 3 folds, Hero raises to $2.70, 1 fold, UTG calls $1.95

Flop: ($5.65) Qhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, 2http://www.flopturnriver.com/phpBB2/...iles/heart.gif, Ahttp://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
Hero checks, UTG bets $4.75, Hero folds

Total pot: $5.65 | Rake: $0.25

it depends on how light he's peeling this flop
at 100NL vs. some regs I'd bet because a lot of people will still call the flop with 99-JJ, KQ type of hands with the intention of showing their hand down

of course what you have against you is that he's UTG so your raise gets more credit so he might dump KQ/QJ type hands pre and 99-JJ on the flop
also NL25 is not as aggressive pre so he might be flatting hands like AK instead of 4b/get it in

so c/f is not unreasonable at all