AQo against a tight aggressive

[brichr]

Party Poker 0.50/1 Hold'em (8 handed)

I have played ~ 200 hands with MP2. Read is tight aggressive.

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
UTG folds, UTG+1 calls, MP1 folds, <font color="CC3333">MP2 raises</font>, CO folds, Button folds, Hero calls, BB calls, UTG+1 calls.

Flop: (8 SB) 2[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="blue">(4 players)</font>
Hero checks, BB checks, UTG+1 checks, <font color="CC3333">MP2 bets</font>, <font color="CC3333">Hero raises</font>, BB folds, UTG+1 calls, <font color="CC3333">MP2 3-bets</font>, Hero calls, UTG+1 folds.

Main concern was MP2 and a c/r had had him lay his hand down twice earlier in the session. I thought I was behind when he re-raised.

Turn: (8 BB) T[img]/images/graemlins/diamond.gif[/img] <font color="blue">(2 players)</font>
Hero checks, <font color="CC3333">MP2 bets</font>, Hero calls.

Should I have represented a flush?

River: (10 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="blue">(2 players)</font>
<font color="CC3333">Hero bets</font>, <font color="CC3333">MP2 raises</font>, Hero calls.

Final Pot: 14 BB

Results in white below: <font color="white">
Hero shows Ah Qd (flush, ace high).
MP2 shows Kd As (flush, ace high).
Outcome: MP2 wins 14 BB. </font>

At what point do I lay this hand down...or do I? <font color="white"> </font> <font color="white"> </font>