Like Hosfac, I don't use the Exchange. But I don't see why it being a married female couple would matter. The game lets it happen, so I wouldn't think it's an issue.
If you decide to use our Swap Shop, be sure to read all the rules that Hosfac linked for you. We're especially concerned that no third party custom content be uploaded to our site. If your file is clear of it, there shouldn't be a problem.