PLO25: Nut full house faces pot size river raise

[automat]

Poker Stars
Pot Limit Omaha Ring game
Blinds: $0.10/$0.25
6 players
Converter

Stack sizes:
UTG: $35.85
UTG+1: $14
CO: $24.65
Button: $25.10
Hero: $24.25
BB: $43.85

Pre-flop: (6 players) Hero is SB with
3 folds, <font color="#cc0000">Button raises to $0.75</font>, Hero calls, BB calls.

Flop: ($2.25, 3 players)
Hero checks, BB checks, Button checks.

Turn: ($2.25, 3 players)
<font color="#cc0000">Hero bets $0.75</font>, BB calls, Button folds.

River: ($3.75, 2 players)
<font color="#cc0000">Hero bets $1.5</font>, <font color="#cc0000">BB raises to $8</font>.
Uncalled bets: $6.5 returned to BB.

Results:
Final pot: $6.75

I bet the turn pretty smallish as I have just about every hand crushed/drawing dead. Same reasoning for my river bet.
What´s my line? Fold, call or raise?

I was totally lost on that river. Is it really possible he´s waiting for the river to raise 99xx? Would he call my turn bet with JJ or a flush draw hoping to improve on the river and/or steal the pot if a scare card hits? Or did he slowplay 33xx all the way? [img]/images/graemlins/confused.gif[/img]