Baby Shower Invite Question

Tierra • Proud mom of a 4 year old boy, Proud USMC wife,pregnant with baby #2. Still trusting God`s timing 🙏.
My sister-in law is the person that guests need to RSVP to on the invites that were mailing. Should she list her address on the envelope as well? I recently got a baby shower invite that didn't have a return address. How are you ladies doing yours?