Who knows? I would certainly be willing to risk asking. I don't think that anyone is going to hell for loving another person, but the expression of homosexuality is clearly against the commands of God. If you part company, you part company, cow or not. Why not just ask? Why not talk about it? If you are willing to ask the question, "Are you gay?" then why not posit, "This is a Christian school, meaning that the covenant you signed indicated that you are a Christ-follower. Do you know what that is all about?" and proceed from there.
Actually it didn't say if there was more conversation but from the attitude/statements of the "couple" AND the kids statement I'd say there was a brick wall there.