AA hand, lost the minimum?

Looking at that flop I was pretty sure my hand was good, only scared of a set or maybe 45 or something of the like. Both of them called me preflop with terrible hands (and maybe I should expect that a lot). I made a pot-sized bet on the turn because I wanted to get rid of all the straight draws or at least make them pay, and I'm pretty sure any hand like KQ or KJ calls, and on the river I just wanted to check it down and see if my hand was good. Thoughts?

***** Hand History for Game 3681252045 *****
$25 NL Texas Hold'em - Monday, March 06, 14:20:10 ET 2006
Table Montana (Real Money)
Seat 6 is the button
Total number of players : 5
Seat 1: I_LoveLamp_ ( $29.65 )
Seat 2: EmdE06 ( $19.50 )
Seat 4: aisle5 ( $37.60 )
Seat 5: strumphus ( $19.10 )
Seat 6: lstrange ( $1.55 )
I_LoveLamp_ posts small blind [$0.10].
EmdE06 posts big blind [$0.25].
** Dealing down cards **
Dealt to aisle5 [ Ad As ]
aisle5 raises [$1].
strumphus calls [$1].
lstrange folds.
I_LoveLamp_ folds.
EmdE06 calls [$0.75].
** Dealing Flop ** [ 5h, Ks, 4c ]
EmdE06 checks.
aisle5 bets [$2.25].
strumphus calls [$2.25].
>You have options at Clara Table!.
EmdE06 calls [$2.25].
** Dealing Turn ** [ 7c ]
EmdE06 checks.
>You have options at Chico Table!.
>You have options at Clara Table!.
aisle5 bets [$8].
strumphus calls [$8].
EmdE06 calls [$8].
>You have options at Clara Table!.
** Dealing River ** [ 2h ]
EmdE06 checks.
aisle5 checks.
>You have options at Chico Table!.
strumphus checks.
EmdE06 shows [ Kh, 4h ] two pairs, kings and fours.
aisle5 doesn't show [ Ad, As ] a pair of aces.
strumphus doesn't show [ 3c, 2s ] a pair of twos.
EmdE06 wins $32.20 from the main pot with two pairs, kings and fours.

I'm surprised the two pair guy didn't attempt a check raise on the turn - maybe you saved yourself from one on the river? Either way, I don't mind the check on the river with the two callers, but heads up I'm betting it.

With no major draws completed, you are really only fearing a set or the obscure two pair, so I'm tempted to value-bet this river, but at 25NL with two others, I don't mind it