AQ - not sure about the line here

[Dr1Gonzo]

Firstly, my standard line on the flop here is to bet. If I am raised then I might usually call down as long as the turn is safe.
For some reason, I tried the classic WA/WB line as I was scared about the raise from a fairly standard player (17/14/1.5/10 hands). It was only over 10 hands so basically an unknown.
Any thoughts? Having taken that line, I'm not really pleased about having to call this river though and I think I should have taken the bet/fold line?

17/17/1.5/10

$5/$10 Limit Hold'em
Seat 3 is the button
Total number of players : 10
Seat 10: MP3( $156 )
Seat 1: LP( $468 )
Seat 2: CO( $204 )
Seat 3: Button( $581.25 )
Seat 4: SB( $143 )
Seat 5: BB( $275.77 )
Seat 6: UTG( $134.71 )
Seat 7: UTG+1( $475 )
Seat 8: MP( $331.65 )
Seat 9: MP2( $262 )
SBposts small blind [$2].
BBposts big blind [$5].
** Dealing down cards **
Dealt to MP[ A[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] ]
UTGfolds.
UTG+1folds.
MPraises [$10].
MP2folds.
MP3raises [$15].
LPfolds.
COfolds.
Buttonfolds.
SBfolds.
BBfolds.
MPcalls [$5].
** Dealing Flop ** [ Q[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] ]
MPchecks.
MP3bets [$5].
MPcalls [$5].
** Dealing Turn ** [ 10[img]/images/graemlins/club.gif[/img] ]
MPchecks.
MP3bets [$10].
MPcalls [$10].
** Dealing River ** [ 4[img]/images/graemlins/spade.gif[/img] ]
MPbets [$10].
MP3raises [$20].
MPcalls [$10].