What would you do as the button here?

[ZootMurph]

Cheap online Party tournament. Blinds are 400/800. I'm UTG. I have 19k and change, and a tight aggressive image. I steal once an orbit, and one orbit ago I showed down KK cheaply when an ace turned vs JJ. MP2 has 11k and is still alive because he called a preflop raise with A5o, and called the rest of his chips on a board of 24Q. Hit his wheel against a set of Queens, LOL. Button has me covered with just over 24k chips, and I have not seen him get out of line.

I call from UTG. MP2 calls, button raises to 1600 with AJ[img]/images/graemlins/spade.gif[/img], blinds fold, me and MP2 call. 3 to the flop with 6k pot.

Flop is J83r. I check, MP2 bets 800, Button calls, I call. 3 to the turn with 8.4k pot.

Turn is 6, putting two hearts on board. I check, MP2 bets 800, Button raises to 6k, I call, MP2 calls (leaving himself only 2.6k left...). 3 to river with 26.4k pot.

River is J, no flush on board. I push about 10k, MP2 calls allin... What do you do as the button, and why? Nice to hear what you put me and MP2 on as well [img]/images/graemlins/smile.gif[/img]

Results and my thoughts while playing this hand later.