$1/$2 NL at Tribeca

I raise $7 in the cutoff with [Jd]. Button has $140 and calls. Hes a typical bad player, not knowing when to bluff, value betting the wrong amounts..ect. I picked off a bluff of his earlier. I had QT and bet a T74 flop. he called. I check / called his pot bet on a 5 turn. Then I check called another $40 on the river which was a 8. He had J8.

Pot $16. Flop [8s][4d]. I checked it to him just to mix it up. He checked behind.
Pot $16. Turn . I bet $10 and he min raised to $20. I call.
Pot $56. River . What do you do?

I bet $50 and call the push as well. If he played A8 or 84 he can have my stack.

with this board, i would bet 56 and fold to a push. villain playing A8 OTB is very likely.