AQs Makes Two Pair on 4 Flush Board

[TomBrooks]

1st Shot at 5/10. Pacific. Full ring, 9 players. 1st Orbit.

Preflop: Hero is UTG with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img]
Hero Raises, fold, MP calls, 3 folds, Button (named BwnTrout) ReRaises, SB and BB fold, call, call.

Flop: (5SB) 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img] (3 players)
Hero checks (?) intending to checkraise, check, check.

Turn: (2.5BB) Q[img]/images/graemlins/club.gif[/img]
Hero Bets, MP Raises, Button folds, Hero calls

River: (9BB) 9[img]/images/graemlins/club.gif[/img] (2 players)
Hero checks, MP bets, Hero calls (??)

My questions:
1. Should have I counted on Button to bet this flop?
2. Should I have called the river?
3. Anything else?