Except when i get bored and frustrated and decide to do something really stupid. Thoughts?

Poker Stars
Pot Limit Omaha Ring game
Blinds: $0.50/$1
6 players


Stack sizes:
UTG: $37.35
Hero: $99.50
CO: $332.50
Button: $37.25
SB: $140.80
BB: $47.25

Pre-flop: (6 players) Hero is UTG+1 with
UTG folds, Hero calls $1, CO raises to $4, Button calls $4, 2 folds, Hero calls $3.

Flop: ($13.5, 3 players)
Hero checks, CO checks, Button bets $2, Hero calls $2, CO folds.

Turn: ($17.5, 2 players)
Hero bets $10, Button calls $10.

River: ($37.5, 2 players)
Hero bets $32

He has about $20 left. I only did it since i had the Ah. Basically, i'm hoping he just has a pair of Jacks or an overpair as I'm now representing one of three hands at least: Ace high flush, trip 8's or trip 5 all of which i don't think he can beat but how smart or stupid is this bluff. I will let you know if he folded or called me after I hear some responses.

I would normally read that flop bet as a non-nut flush testing the water, but you could be right, a set is possible.... more so when he calls the turn, if he's just filled up top boat i'm sure that's how he'd play it. That said, he also could have some mediocre flush plus a 5, or even just K-high flush. I think given that range a river bluff is not unreasonable. Against anyone good I don't think it's sensible, but his flop bet suggests he's probably semi-clueless.