SB vs EP, AKJTss flat call

Hi guys

So here I decide to slowplay my hand preflop even though villains opening range is roughly the same from all positions.
From OOP I like to extract value in high SPR situations rather than pushing my EQ preflop. My hand is very strong, close to premium, so I could of course very profitably 3-bet against anyone who doesn't open too tight.
The main reason I didn't 3-bet is that my hand would be very very face up and I hate doing that against players who like to defend too wide (I assumed this villain falls into that category). It's really not easy to get them off of their EQ, they love outplaying the perceived part of our range, while also making plain dumb calldowns.

$0.50/$1 Zoom Pot Limit Omaha Hi
PokerStars
6 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($161.09) 161bb
UTG+1 ($50) 50bb
CO ($449.41) 449bb
BTN ($261.95) 262bb
Hero (SB) ($108.44) 108bb
BB ($130.21) 130bb

Pre-Flop: ($1.50, 6 players) Hero is SB
UTG raises to $3, 3 folds, Hero calls $2.50, 1 fold

Flop: ($7, 2 players)
Hero checks, UTG bets $4.67, Hero calls $4.67

I'm just calling. I could raise because I have quite a lot of AA and some Ax bluffs in my range as well, so I could strengthen my range this way. But on this texture I'm not sure I should play so straight forward with most of my top range, because the texture can change a whole lot. I don't have ultra-premiums and most premiums in my flatting range, so I'd have to make difficult turn/river decisions very often.

Turn: ($16.34, 2 players)
Hero checks, UTG bets $10.92, Hero calls $10.92

Again I could raise very profitably against this player. In hindsight I believe it's the best play because of my backup EQ. On the other hand if I make villain believe that my hand is different from what it looks like, I can extract massive value by allowing him to value bet thin on the river. If I raise now he could make a solid fold with TP or weak bluffs.

River: ($38.18, 2 players)
Hero checks, UTG bets $36.46, Hero ?

Here's my question: Can I ever fold?
I didn't expect a potsized bet at all. I do not expect this villain to be overbluffing with this betsize, it just doesn't make much sense if my hand looks kind of weak anyway. So this looks more like a bet designed to get maximum value from 2P. I only chop with at least one value hand, I could beat some weaker value hands, and I beat all bluffs.
It's weird, but I'm not actually particularly happy in this spot. My EV if villain's never bluffing may be negative against some players, right? If my assumptions about his betsize are correct, I should not expect him to have a lot of worse 2P here. Or is that just paranoid me?