Should've I made this call?

[WVTriker]

UTG+1 is VP%IP 45, W$SD 25, fairly loose-aggressive and has been up and down with his stack all session. This is my first session with him.
MP2 is VP%IP 51, W%SD 80, playing pretty solidly as far as I can tell. I've played more hands with him than UTG+1

Party Poker
Pot Limit Omaha 8 Ring game
Blinds: $0.10/$0.25
9 players


Stack sizes:
UTG: $2.71
UTG+1: $23.40
MP1: $24.85
MP2: $27.07
MP3: $24.60
Hero: $16.67
Button: $36.30
SB: $56.15
BB: $16.65

Pre-flop: (9 players) Hero is CO with :3d :7s :js :ac
UTG folds, UTG+1 calls $0.25, MP1 folds, MP2 calls $0.25, MP3 folds, Hero calls $0.25, Button calls $0.25, SB calls $0.15, BB checks.

Flop: :td :jc :5s ($1.5, 6 players)
SB checks, BB checks, UTG+1 checks, MP2 checks, Hero checks, Button checks.

Turn: :2h ($1.5, 6 players)
SB checks, BB checks, UTG+1 bets $1.45, MP2 calls $1.45, Hero calls $1.45, 3 folds.

River: :8h ($5.85, 3 players)
UTG+1 bets $2.63, MP2 raises to $8.4, Hero folds, UTG+1 calls $5.77.

Results:
Final pot: $22.65
UTG+1 balance 13.30 lost 10.10 5c 5h 3h Kc
MP2 balance 38.52 bet 10.10 collected 21.55 net 11.45 2d As 9d Qd

I figure that UTG+1 is probably dead in the water (and it turns out I was right). But he really could have had anything. On the turn I thought MP2 was semi-bluffing with a low draw. On the river I figured that he must have a strong low and a high straight with something like A-3/4,3-4 and 9-10/Q the way he bet. MP2 I thought was too good a player to not have the high and what he figured to be the low. Turns out I was pretty close in my analysis. I was thinking I was probably going to be quartered here.

Should I have called the river bet? And, really, should I have called the turn bet for that matter?

[Kuso]

[WVTriker]

I guess there's good news and bad here. The good news is I thought (after the fact unfortunately) pretty much what you said. And that I'm learning from my mistakes and being too passive. The bad news is that I didn't think of any of it curing the darn hand! I think I was too preoccupied with being 1/4ed to make the right play.