It is not possible to send to two addresses in the Profile 1 only.  You cannot add both email addresses to the Profile 1 tab of the fund holder. 

If you add both email addresses to the Profile 1 tab, neither address will receive an email.  The system will see the email address as an invalid format.    The only way to accomplish this is for the fund holder to set a rule in their own email application (e.g. Outlook) stating any email from DonorCentral should be forwarded to the other email address.