Just when you thought the Duggar family couldn’t get any bigger Jill Dillard has revealed she wants to adopt! The former “19 Kids and Counting” star shared her plans alongside husband Derick Dillard in a preview for episode 3 of TLC’s “Jill & Jessa: Counting On” Sunday.

Episode 2 of the three-part Duggar special followed Derick, 26, and Jill, 24, as they traveled with their son Israel to Central America for an extended mission trip. The promo video for the episode 3 shows the couple will spend time at a children’s home working alongside orphaned kids. It is then that Derick reveals he, like Jill’s sister Jessa Seewald and her husband Ben, would like to adopt.

“I can definitely relate to Jessa and Ben’s desire to adopt and we’re definitely considering it,” Ben says.

“Who knows? We came down to Central America as a family of three. We could go home as a family of four,” Jill teases.

Jessa, now 23, and Ben, 20, opened up about their desire to adopt in episode 2. The couple shared they had been looking into adoption before discovering Jessa was pregnant. When they found out they were expecting, they were told they must wait until their child is at least 9 months old to continue the process.

This isn’t the first time Jessa and Ben have discussed adoption. “If God blesses us with biological kids of our own, it’s not going to quench our desire to adopt,” Jessa told People in February prior to announcing her pregnancy. “We hope to adopt a lot of kids.”

The rest of the “Counting On” finale, titled "Counting One More," will follow Jessa and Ben as they pose for a maternity photoshoot. Viewers will also see the arrival of their son, Spurgeon Elliot, who was born Nov. 5. Episode 3 of "Jill & Jessa: Counting On" airs Sunday at 9 p.m. EST on TLC.