Kelly,
Please read section 1.5 of the product terms and conditions. The link is at the bottom of this page. These are the terms and conditions that you agreed to when you purchased the PM PrepCast. there you will see that you have purchased a single user licence that you may not share with others. That includes your spouse.
You need to purchase a second licence.
This is comparable to when you attend a live, in person class. You cannot register one person and expect to have two people attend for a single registration.