General :: Can Add Recipient To SMS Reply

I understand how to create a new message and send it to multiple recipients...but...how do I send a reply from one recipient to multiple people?

Example:

Incoming text from 555-1234: "It's a boy!"
Reply: "Congrats!" <-- will only respond to 555-1234

I would prefer to have something like:

Incoming from 555-1234: "It's a boy!"
Reply to 555-1234 and 2 other people: "Congrats on your new baby boy, 555-1234!"

Can't seem to figure out how to add additional recipients on the response.