KK with Ace on flop

Hey All,
The reason I folded was because I figured that since both of them called a big preflop raise, one of them had to have an ace.
Because I thought at least one of them must of had an ace, I didn't even bet the flop. Maybe I should've bet the flop, but I figured I was beat anyways, so just lt this one go.
Thoughts?
Shooby



***** Hand History for Game 3277889223 *****
15/30 Tourney Texas Hold'em Game Table (NL) (Tournament 18692561) - Wed Dec 28 23:07:08 EST 2005
Table Table 67997 (Real Money) -- Seat 9 is the button
Total number of players : 10
Seat 1: thesatty (885)
Seat 2: dean1969111 (800)
Seat 3: OhWaiter (770)
Seat 4: kjfunfs81 (800)
Seat 5: sw212 (770)
Seat 6: mary1819 (770)
Seat 7: tlugo21 (800)
Seat 8: fredg_13 (845)
Seat 9: boomboxjon (775)
Seat 10: rusty_78 (785)
rusty_78 posts small blind (10)
thesatty posts big blind (15)
** Dealing down cards **
Dealt to sw212 [ Ks, Kh ]
dean1969111 folds.
OhWaiter calls (15)
kjfunfs81 folds.
sw212 raises (105) to 105
mary1819 folds.
tlugo21 folds.
fredg_13 calls (105)
boomboxjon folds.
rusty_78 folds.
thesatty folds.
OhWaiter calls (90)
** Dealing Flop ** : [ 4s, Ad, Qh ]
OhWaiter checks.
sw212 checks.
fredg_13 bets (65)
OhWaiter folds.
sw212 folds.