The Duggars are planning on having a dinner party and they invite two other large families to join in for a fun, and crowded, evening. And get an update on the three youngest Duggars - Jordyn, Josie, and first GrandDuggar, Mackynzie. It is also announced that Michelle is expecting number 20, but no, a crewman (Jon Boyle) and his wife are expecting first child.