What to do on the river?

[wireMan]

Check behind and take the free showdown. Are you planning on calling a raise if that happens? I think MP1 has a J, it's just a question of the kicker. He probably incorrectly thought you were pumping your flush draw on the flop. Turn comes, still no heart, so he comes out betting OR he's pumping his flush draw with the turn lead? I'm just taking the free showdown.