Hello GabeRoss,
Welcome to the community!
While you can likely add a second line to your account, you should note that Fido does not offer any Family Share plans. A second line would have its own plan and separate costs. You can view the second line options via your My Account.
As far as I am aware, only the parent providers (ie Rogers, Bell, Telus, etc) offer those Family share-type plans (see here).
You should note the forums are community-driven and not intended as a venue for customer services. We do not have access to customers' accounts nor would we access to all available promotions. If you would like to discuss your options for a second line, you would need to contact customer service. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above. Though, it should be noted that adding a line with customer assistance would likely incur a set-up fee for that new line.
Hope this helps 😀
Cheers
