I'm so lost at the river here multiway with AA

[SoCalPat]

Didn't save the hand. My apologies.

I'm on the button with AA. Two seats to my right is a maniac, who has gotten clobbered by the deck after PF raising Q4o and 57o.

Several limpers, prolly 5 to me. I raise, everyone but one of the blinds call.

Raising war between myself and the maniac erupts on a 9-high, two-suited flop. Turn brings a rag, but the player to the right of the maniac comes out with a turn three-bet after I raised the maniac. Maniac calls, as do I.

Down to three, river brings another 9 AND puts a three-flush on the board. Turn C/R'er bets, maniac raises.

What in God's name do you do here?