yeah theres no way this gets called by enough worse hands to be good. river could easily help hero, 67, 44, 55, A2, weird TT or 33, and thats a whole shitload for him to call, so his legit raising range here is somewhat wide. i dont think hero's line looks bluffy at all, tons of people do this when the river a concealed monster. but i suppose if hero's range here so far has been polarized to only nuts and bluffs here then he might call, but a nit should be leaning towards folding in that situation. and i do think vill can def have a ten here which he calls with almost never, and he can also have a 3, and the only 3's that are in his range are 34 which is a boat, 33 quads, a3 nut trips, all of which he is snap calling. so just call.