[rigoletto]

You have to bet the turn here. The fact that so many called your UTG raise and flop bet could indicate a lot of pocket pairs out there and they might have a hard time letting go of those even with the A out there, besides the case A might be out there.

So many players check their strong hands on the turn on a board like this which IMO a mistake: what will they call the river with that they wouldn't call the turn with?