Just tell her whats wrong. I wet the bed and wear diapers. I say a true friend would be nice about it. Their not going to hate you for it. They might think it's alittle wierd, or they'll think it's kinda funny. Their won't be a big rumor going around about it. I can gaurantee that. So just relax. Tell her before she comes, so you'll be alot less embarrassed about it when she comes.