Scared of ace, what should I have done?

I was scared somebody would have an ace. Advice?

PokerStars No-Limit Hold'em, $0.02 BB (9 handed) converter

saw flop|saw showdown

SB ($1.02)
BB ($2.24)
UTG ($1.40)
UTG+1 ($5.57)
Hero ($1.37)
MP2 ($0.98)
MP3 ($2.50)
CO ($1.59)
Button ($5.83)

Preflop: Hero is MP1 with K:spade:, K:diamond:.
UTG calls $0.02, 1 fold, Hero raises to $0.08, 1 fold, MP3 calls $0.08, 3 folds, BB calls $0.06, UTG calls $0.06.

Flop: ($0.33) A:spade:, Q:club:, 2:diamond: (4 players)
BB checks, UTG checks, Hero bets $0.12, MP3 calls $0.12, BB calls $0.12, UTG folds.

Turn: ($0.69) 4:club: (3 players)
BB checks, Hero checks, MP3 bets $0.1, BB calls $0.10, Hero folds.

River: ($0.89) A:heart: (2 players)
BB checks, MP3 bets $0.2, BB calls $0.20.

Final Pot: $1.29

Results in white below:
BB has Th Qs (two pair, aces and queens).
MP3 has 5h 2h (two pair, aces and twos).
Outcome: BB wins $1.29.

Good fold. You had a good starting hand. Preflop raise 4xs BB. Ooops an overcard on the flop. Yet you through out the probe bet anyway. Good. Ooops! a call and and overcall. The overcall is usually big trouble. Note MP3 is simply retarded (make not of that). Easy to get away from with the overcard and 2 active players making big bets.

Well-played in my opinion, although I think you could have raised it more before the flop. Looks like this is not a table where 3X BB will get many folds. You still have to bet the flop, and when you get called by everybody and their brothers, probably a good idea to check/fold the turn.

Should I not also be betting on the turn? I feel like I showed weakness there, because I FELT weak, because I felt like at least one of them had to have an ace with my pre-flop bet and them still betting. I read all the stuff about "You have to dominate, not be dominated" and I feel like I was dominated on the turn when I showed weakness. Then again, I have a feeling they would have called if I had bet something anyways and I would be out more money than it already cost me.

In most cases one of them will have an A. You played it correctly, unless you had a read that both guys were complete numnuts.

- sed

Showing weakness isn't a bad thing if you have every reason to think you're beat. Particularly against an opponent that plays loose and would never fold top pair. Against a tight player you might be able to bet them off their aces, but against these guys? You are pretty sure they have the ace, pretty sure they'll call you down no matter what, so go ahead and fold.

but the .10 turn bet was very weak. Remember, not only do you have to worry about what your opponent has, but also what he thinks you might have. If he puts your preflop raise as a pocket pair, and then you put out a tester bet on the flop, it is entirely possible his Q beats you. Your flop bet was not confident. It was a tester. You could have jj or 10 10 in this case. His .10 bet was a tester as well. The other guy only calls. If he had a hand he would have bumped it. I would have called the turn and then made another decision on the river. But that is just me.