0.25/.50 LO8: nut flush on paired board

[nearlyalex]

Full Tilt Poker
Limit Omaha Hi/Lo Ring game
Limit: $0.25/$0.5
6 players
Converter

Stack sizes:
UTG: $2.70
UTG+1: $9.15
CO: $1
Hero: $6
SB: $6.65
BB: $3.45

Pre-flop: (6 players) Hero is Button with Q[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img]
UTG folds, UTG+1 calls, CO calls, Hero calls, SB calls, BB checks.

Flop: K[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] (5SB, 5 players)
SB checks, BB checks, UTG+1 checks, <font color="#cc0000">CO bets</font>, Hero calls, SB folds, BB calls, UTG+1 calls.

Turn: 7[img]/images/graemlins/club.gif[/img] (4.5BB, 4 players)
BB checks, UTG+1 checks, <font color="#cc0000">CO is all-in $0.5</font>, Hero calls, BB calls, UTG+1 calls.

River: Q[img]/images/graemlins/club.gif[/img] (8.5BB, 3 players + 1 all-in - Main pot: 8.5BB)
BB checks, <font color="#cc0000">UTG+1 bets</font>, Hero ???


i am new to LO8 and omaha and was wondering should i fold this? my reason for calling was if he had set on the flop he would of most likely bet or raised. i had just sat down and had no reads.