updated 03/14/2011 AT 1:45 PM ET
•originally published 03/14/2011 AT 9:45 AM ET
Three months from now, the super-sized Duggar family will add another boy!
Josh Duggar, 23 – the eldest son of Jim Bob and Michelle – and his wife Anna, 22, are expecting their second child on June 19 to join older sister Mackynzie, 17 months.
The couple chose an unconventional method for learning the gender of the child – they had Michelle tell them.
“We went to the ultrasound and decided that my mom would know,” Josh tells PEOPLE. “We figured she could handle the secret and then have a surprise sharing of the information with the entire family, including me and Anna.”
They waited more than a week, and it wasn’t easy. “I think Anna was getting a little bit anxious and excited to know, kind of antsy,” says Josh. Anna agrees: “We thought it was fun to have the whole family hear at the same time and have the excitement together, but it was hard to wait.”