Well said, Learning to Fly.
Two weeks is a pretty long time for a child to be away from his parents, I think. But I don't think he'd be too confused by being around a couple of gay men. If these guys are intelligent adults who have the sense not to act inappropriately around the little one, then it's fine. As with any couple, straight or gay, it's one thing to give your partner a kiss or a squeeze in front of a child, quite another to engage in prolonged make out sessions. I'm guessing that these guys are decent fellows, otherwise you wouldn't even consider letting your child be around them in the first place.
Perhaps it would make you feel more comfortable to sit down with these men and frankly voice your concerns. Open a dialog about what each of you consider to be appropriate behavior, and be sure you're all on the same page. Talk to your child as well. If he's not accustomed to seeing same-sex couples holding hands and whatnot, explain to him, briefly and without drama, that these are two people who love each other in much the same way as mom and dad do. I only point this out because the first gay couple I'm aware of having known were two men whom I'd assumed were just good friends. One day, I happened to see them kiss each other briefly on the lips, and I was confused only because I hadn't realized that their relationship was romantic in nature. If I'd known, it wouldn't have been a shock to me at all, but as I thought they were just buddies, well, I was kind of taken aback.
I think it should not be a problem for your child, except for a bit of homesickness.
