George tainted the money with coke before Bridgett went out with it. Now if a drug sniffing dog hits on it, Joel and Lisa will be detained while their luggage is searched.
I also think that Bridgett is starting to complicate things.
Given what we currently know about Shane and that he doesn't have any friends in the area basically making him lonely, along comes Trevor. Given what we know about Trevor at this point, he's also without his friends. The two guys are fast becoming friends. A true friend will show concern to another as Shane has done here with Trevor.
I can also see signs were Shane will become the Australian version of Joel. Remember how Joel was always screaming sexual harassment? I can see Shane teasing Trevor about his clumsiness. Shane knows what he's doing and doing to Trevor. Remember when they were walking down the street and Shane took off his shirt, Trevor walked into the tree.
With the bright sunlight, Shane would have been able to see thru the material and see Trevor walk into the tree. Since then, he's been doing things to see what happens. I think Shane has figured Trevor out and is having fun with him and at the same time he doesn't want see Trevor get hurt in any way.