, I generally avoid posting here because I am not actively writing fiction for publication, but I felt really, really strongly about what you wrote.
I totally agree with you and Amanda Beth (and she has great ideas for emphasizing the unacceptability of it which do not need any further suggestion from me). This lady is obviously in complete ignorance of social history and global events, which makes me question everything else she says. This kind of thing is not about "some silly law" - it's about deeply ingrained social beliefs/taboos/structures/what-have-you. Yes, currently on this planet in many countries, people are forbidden certain relationships (not to mention other actions) on pain of death - not by law necessarily, but because their family or neighbors will rise up and slaughter them for shaking the structure of the society. And even in free countries, people are still killed by their neighbors for identity issues - I doubt that America is the only free country that has in recent years had people slaughtered over race and sexual identity. This despite
laws forbiddening non-judicial murder of any person, for any reason.
Rant over. Perhaps you could think of this lady as an example of a reader who requires education around these issues, which would be a huge social service you, as a writer, could perform. She clearly needs it to be more evident in the text that this relationship is forbidden for convincing reasons. Looks like your story might get a bit longer....