Contact Book Email Address

I have set up a contact book for our Homeowner's Association.  I have entered both the husband's email and the wife's email (as email 2).  I recently sent out a mass email and it only went to the first email address (husband).  It did not pick up the wife's email.  How do I make sure that both email addresses are being notified of my email? Do I have to do a separate contact name for the wife?