Should I have slowed down here?

Should I have slowed down here? Any way to know I'm against AA - I figured afterwards that it was impossible for me to know I was up against an overpair greater than QQ because of his passive play (both post and pre flop). I figured this was just another bad beat, but I want to hear your oppinion

***** Hand History for Game 2671139727 *****
$25 NL Texas Hold'em - Wednesday, September 07, 16:29:43 EDT 2005
Table Table 37721 (Real Money)
Seat 1 is the button
Total number of players : 10
Seat 1: barby12 ( $8.80 )
Seat 2: RobertLOL ( $24.75 )
Seat 3: JohnnyB05 ( $16.65 )
Seat 4: JEHSr ( $20.50 )
Seat 5: twangler ( $36.29 )
Seat 6: bizzex ( $15.20 )
Seat 7: unceunce ( $28.08 )
Seat 8: Fishingman7 ( $23.30 )
Seat 9: qblob2 ( $21.70 )
Seat 10: Beemo126 ( $39.78 )
RobertLOL posts small blind [$0.10].
JEHSr posts big blind [$0.25].
** Dealing down cards **
Dealt to RobertLOL [ Qc Qs ]
bizzex calls [$0.25].
unceunce raises [$0.50].
qblob2 folds.
Beemo126 folds.
barby12 calls [$0.50].
RobertLOL raises [$1.90].
JEHSr calls [$1.75].
bizzex folds.
unceunce calls [$1.50].
>You have options at Table 36604 Table!.
barby12 calls [$1.50].
** Dealing Flop ** [ 5h, 7s, 2c ]
RobertLOL bets [$4].
JEHSr folds.
unceunce calls [$4].
barby12 folds.
** Dealing Turn ** [ 8s ]
RobertLOL bets [$8].
unceunce calls [$8].
** Dealing River ** [ 9h ]
RobertLOL is all-In [$10.75]
unceunce calls [$10.75].
RobertLOL shows [ Qc, Qs ] a pair of queens.
unceunce shows [ Ad, As ] a pair of aces.
unceunce wins $51.10 from the main pot with a pair of aces.
>You have options at Table 36568 Table!.
bizzex has left the table.

It's really hard to read an over pair bigger than your over pair when the opp has position and isn't raising. He's so passive he could have anything here. Your play looks good but you might get more value in the future (or save yourself money, same thing) when if you find yourself pot commited by the river and are willing to call an all in...but you're not sure you have the best hand, if you check then call all in. Here only a hand that beats you will call. A lot of hands that beat you will check behind (AA might even check behind on the river here, with the possible strait on board and the chance you hold a set). By betting your last 10$ out of position you are essentially giving that money up to a better hand, or taking down the pot when he folds when you have the best hand. If you have the best hand, you might as well just show it down without riskign that 10$ for nothing. If you check and he pushes, you can still call and get the same result as if you push and he calls. At least by checking the river you will save that final bet some of the time.