Flopped the nut flush - could I have made more?

[OrangeKing]

No read on CO; this was their first hand. UTG is a LA-A (50/7/1.54, but only in about 50 hands).

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is UTG+2 with 7[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img]. CO posts a blind of $0.5.
UTG calls, UTG+1 folds, Hero calls, MP1 folds, MP2 folds, MP3 folds, CO (poster) checks, Button folds, SB completes, BB checks.

Flop: (5 SB) 5[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">UTG bets</font>, Hero calls, CO calls, SB folds, BB folds.

Turn: (4 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, UTG folds, Hero calls.

River: (8 BB) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls.

Final Pot: 10 BB

Any thoughts? I'm mainly concerned with whether I should have reraised the turn instead of just calling and hoping for another raise on the river, which was probably silly. I'm thinking I should have - even if he somehow folds the river, I make the same amount. Any comments on this, or anything else in the hand are appreciated!