Since you didn't provide any info, I'm assuming villain is unknown. You flopped overpair with SPR=1,3. For what we know villain could have JTs or AJs that he might think is best when you check twice. Never folding, unless I had a read that villain was even bigger nit then you ;)

I'm not sure what worse hands will call but I think we should not be folding to a bet on the river. If we fold then what do we call river with, only sets? It's difficult to beat an overpair on this board, even if it does happen sometimes.

X/f both turn and river seems best if hes a somewhat tight and/or conservative REG. Really like your cbet sizing.

I think XF turn is a viable option, but when it goes XX OTT small bet OTR should be the play. We target his Jx, weird underpairs, so 1/3 pot bet is definitely better than XC. Though we might XC versus very aggressive villain, who can turn weak SD into bluff

I think you got a good signal when you got 3 callers with your 3 bet pre flop. more info when you Cbet and got two callers, Either someone had a set or two pair. One pair with 2 such callers is rarely winning. I think you were smart in Xturn and X river

There are $51 in the pot and MP has $32 left. You have an overpair in a massive squeezed pot. There is no way you should do anything else than go all-in on the turn.
The spot to check here is the flop and not the turn imo.
If you c-bet this squeezed pot, and then check-fold ott you are lighting stacks of money on fire.

-im deffo not folding on the at any point in this hand,
-i agree with kuduku im shoving turn, if your folding turn you saying you opp has always got QQ/JJ i dont think AA is ever an option with him flatting your 3B with two players still to acts,
-villain could have called AJs JQs 10Js KJs which he would still call flop with,
-i dont hate x/r turn or if it goes x/x betting river small/ shoving river
-but imo its way to nitty to be folding here and we will be folding the best hand a fair amount of the time if we do