Again, I'm gonna respond with something that's irrelevant to OP, but turn is a very very standard vbet. I mean top pair against a fish on just about any wet board is a standard enough vbet, but seeing as how it's 4-handed and you're opening a tonne from all available non-blind positions, it's honestly really bad to check behind here.

Of course with some sort of read that he's super fit or fold on the flop or that he bets the river close to 100% of the time when the turn goes check-check all this talk on "standard" plays go out the window, but that's not what our reads indicate.