The couple are expecting their second child in February

By Aurelie Corinthios
Updated October 18, 2016 12:20 PM

Jessa (Duggar) Seewald and her husband Ben have some exciting news to share with the Duggar family on this week’s Counting On.

In an exclusive sneak peek at Tuesday’s episode, the two are preparing to take some very special family photos with their son Spurgeon, 11 months, to announce their second pregnancy to Jessa’s family.

“We have a little chalkboard that we’re going to have in the photos with us that has a special announcement for my family,” explains Jessa, 23.

The chalkboard reads: “Doubling the Love. Feb. 2017,” and Jessa and Ben plan on framing the photo and surprising the family with it.

Of the couple’s initial reaction to the news themselves, Jessa said they were “both excited and surprised” — especially because Spurgeon was just a little over 6 months old when they found out.

“I mean, for my sister-in-law Anna [Duggar] and for my sister Jill [(Duggar) Dillard], they didn’t get pregnant like right off, like bam!” explains Jessa, adding with a smile: “I guess I’m built more like my mom.”

“With my last pregnancy, we waited for about 12 weeks to announce to everybody, and so that’s about where we are right now,” she adds. “We’re about 14 weeks, so a little further along.”

Jessa says the two plan on having everybody over to their house to enjoy some dessert, and then somehow work the big reveal into the afternoon. But that being said, the TLC star admits that some of her older sisters have already figured it out.

“Jill asked me like, a week after we found out,” says Jessa. “We were video-chatting and she was like: ‘Are you pregnant?!’ But most of the family doesn’t know.”

“We need to announce before it leaks on Twitter!” adds Ben, 21.

As for whether the two are prepared to be parents to not just one, but two babies?

“No — we’re not prepared, not yet,” says Jessa. “We’ll be getting prepared. We didn’t feel prepared to be parents the first time around!”

“We’re excited, but at the same time, I’m like: ‘I hope I’m ready for this,’ ” confesses Ben. “How is it going to be having two kids, two young little babies?

Counting On airs Tuesdays (8 p.m. ET) on TLC.