Hi,
Are you and your husband both PR? If yes, I don’t think you need an invitation as technically you are residents of Canada but live outside country. All you need is a Canadian address that your family will be staying and you or your husband should make the invitation for the baby. So to your second question, the relationship proof should be you or your husband with the baby depending on who made the invitation, and a birth certificate is enough. I will pm the template but you do need to stress in the letter your current situation and what you will dIndia. I am planning could you please share the LOE template with me? It would be of great help in compiling a visa/permit request fo