25NL: Set vs flush?

[UFGatorGuy]

No reads, is this ever AQ/AK/something else that doesn't beat me? Comments on all streets appreciated, especially river.

Full Tilt Poker No-Limit Hold'em, $0.25 BB (5 handed) Hand History converter Courtesy of PokerZion.com

Hero ($33)
BB ($21.85)
UTG ($32.75)
MP ($7.70)
Button ($20.15)

Preflop: Hero is SB with 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $0.85</font>, <font color="#666666">2 folds</font>, Hero calls $0.75, <font color="#666666">1 fold</font>.

Flop: ($1.95) A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, UTG checks.

Turn: ($1.95) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $1.5</font>, UTG calls $1.50.

River: ($4.95) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3.3</font>, <font color="#CC3333">UTG raises to $12.5</font>, Hero ???