This is a perfect example of a well meaning player answering a question, and actually getting it utterly utterly wrong. 74miller you need to re-acquaint yourself with the rules before you answer any more questions in here. The rule quite clearly states one nation per IP. I have no idea where the email address became significant!
As for messaging mod staff, frankly that's exactly how you get caught. Moderation staff will not listen to any reasons or excuses, if you are caught with more than one nation you will be deleted, period. If you have not yet been deleted, your only hope is to get your sister to delete.