NL100 FTP Reraise with made flush on river (paired board) ???

[CASHius-Clay]

Ok heres my problem. First of all, I know that my preflop call was very loose, but I like the suited connectors and suited gap connectors as long as I can see a cheap flop. So please don't answer:"Fold preflop" (I got that answers already ;-) )

What I want to know is: "As played, should I reraise his raise on the river or is my call ok??????

<font color="green">Question: Should I reraise him at the end or is the call fine? </font>
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Full Tilt Poker No-Limit Hold'em, $1 BB (9 handed) Hand History converter Courtesy of PokerZion.com

CO ($134.60)
Button ($69.80)
SB ($143.75)
BB ($39.60)
UTG ($84.70)
UTG+1 ($100)
MP1 ($90.60)
<font color="blue">Hero ($127.40)</font>
MP3 <font color="#A500AF">(villain)</font> ($98.50)

Preflop: Hero is MP2 with 7[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, Hero calls $1, MP3 <font color="#A500AF">(villain)</font> calls $1, <font color="#666666">1 fold</font>, Button calls $1, SB completes, BB checks.

Flop: ($5) 4[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $2.25</font>, villain calls $2.25, Button folds, SB folds, BB folds.

Turn: ($9.50) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, villain checks.

River: ($9.50) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, <font color="#CC3333">villain raises to $15</font>, Hero calls $11.

Final Pot: $39.50
<font color="white"> Villain hand: A9o </font> &lt;-- Villain hand
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Thanks for your help

Patrick

EDIT: Villain didn't have a straight, just three Aces.