Live NL Flop decision

[runnerunner]

Live $2-5 NL.

3 limpers to hero in CO with A [img]/images/graemlins/diamond.gif[/img]9 [img]/images/graemlins/diamond.gif[/img] Hero calls, button calls, BB raises to $15. Everyone calls. 5 players to the flop.

Flop ($62)
A [img]/images/graemlins/heart.gif[/img]A [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/heart.gif[/img]

Check around to hero ($450) who bets $40. Button ($500) raises to $140. Folded around to hero.

Button is regular in the game who sees a lot of flops and is very aggro post flop. Will make big bets to pick up pots that no one else wants. This is hero's first hand at the table as just came from the must move game.

Hero's action??