Nuts + Redraw to Nut Flush. Best way to play it?

[cbboy]

No real specific reads. I have been playing very aggro and raising most hands. The button has been playing a lot of hands and starting to play back at me. He's a 2p2er as well. I'm not sure whether or not he knows I am or not though. He has started 3-betting me within the last few orbits, but thats a bout it.

Full Tilt Poker
Pot Limit Omaha Ring game
Blinds: $0.50/$1

CO has $60.35 to start the hand.
I have $275.60 and BTN covers.

5 players
Converter

Pre-flop: (5 players) Hero is UTG with A[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises to $3.5</font>, CO calls, Button calls, SB calls, BB calls.

Flop: 5[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] ($17.5, 5 players)
SB checks, BB checks, <font color="#cc0000">Hero bets $13</font>, <font color="#cc0000">CO raises to $56.5</font>, Button calls, 2 folds, Hero...?!?!?

What is the best line to take here? I obviously want to get it AI with the BTN here. What is the best way to do that? Just repot it here and hope he pushes? Raise a small amount and hope he pushes? Call and get it in on the turn?