Hello Ladies,I'm beginning to look at invitations, mostly on etsy.com. Are you having an outer and inner envelope? My mom thinks this is neccessary to stress who exactly is invited. So we don't have children we barely know there. For instance the outer envelope would say"Mr. and Mrs. Jones" and the inner would say "Joseph & Mary" For a family where we are inviting the children, the outer would say "Mr. & Mrs. Jones and Family" and the inner would say "Joseph, Mary, Hannah, and Lily"I am not sure if this is done anymore. I have received invites with and without them. I would think it would be hard to stay within the standard postage rate with both. Is it necessary?Thanks for your help!