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.