@Ianwain Gareth is, of course, spot on with his comments about account ownership, however, it isn't clear from your post if your wife is the account holder with your address being the secondary one, or if it is the other way round, with you being the account holder having set a secondary account for your wife to use.
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GrahamI'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media, I'm a VM customer. There are no guarantees that my advice will work. Learn more
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