Full Tilt Poker
Pot Limit Omaha Ring game
Blinds: $0.25/$0.50
7 players
Converter

Pre-flop: (7 players) Hero is MP1 with
UTG calls, UTG+1 calls, Hero calls, CO calls, Button calls, SB calls, BB checks.

Flop: ($3.5, 7 players)
SB checks, BB checks, UTG bets $3.5, UTG+1 calls, Hero calls, CO folds, Button calls, 2 folds.

Turn: ($17.5, 4 players)
UTG checks, UTG+1 bets $17.5 I??????

Without knowing stack sizes it's pretty hard to make a rational response. With 2 players still to act behind you calling is riskier than if it were HU. Myself I would fold here, as I have nothing, and even if a low card comes it may not be good for half.