Opponent hasn't gotten out of line yet but this is $25 plo on party so who knows. Do you call the river?

Party Poker Pot-Limit Omaha High, $0.25 BB (8 handed)

MP2 ($4.49)
CO ($17.5)
Button ($22.5)
SB ($47.73)
BB ($9.75)
Hero ($25.95)
UTG+1 ($70.53)
MP1 ($49.18)

Preflop: Hero is UTG with , , , .
Hero calls $0.25, 1 fold, MP1 calls $0.25, MP2 calls $0.25, CO calls $0.25, Button calls $0.25, SB completes, BB checks.

Flop: ($1.75) , , (7 players)
SB checks, BB checks, Hero bets $1.75, MP1 calls $1.75, MP2 folds, CO calls $1.75, Button folds, SB folds, BB calls $1.75.

Turn: ($8.75) (4 players)
BB checks, Hero checks, MP1 checks, CO bets $7, BB folds, Hero calls $7, MP1 calls $7.

River: ($29.75) (3 players)
Hero checks, MP1 checks, CO bets $8.5 (All-In), Hero ????

I don't know much about omaha, but why not fold the turn? That said, I fold the river.