Not sure why they asked her to fill the forms. As per this link the form is supposed to be filled by primary applicant. My guess is since she received the email and it may be a generic email. I guess something you probably need to clarify.In the passport request letter, they asked my wife to submit an updated family information. Specially, they asked she filled the IMM008 and Additional Family Information forms. I was able to get the Additional Family Information forms but the IMM008 has different versions. I am not sure the exact one to submit. Please can someone who have experience advise! Thanks
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/complete-0008-5669.html