metagame BET/CALL (payoff)

[KitCloudkicker]

full 10. Villain is the indian doc regular at the borg 10, for those who play there. he never bluffs big streets.

I raise AKo UTG. predictably 4 people cold call plus the BB.

Flop is A22 rainbow so it probably hit everyone. i bet, somehow 3 people find a way to call.

Turn is a J. I bet and 1 caller.

River is a 5 (there is no flush possibility). I bet, he stares at the board, tanks, and raises. this is always A5 but i feel i should payoff anyway for metagame.

anyone disagree?