The pair broke the news to fans with a special new YouTube video, shared on Friday. In the clip – titled “Son Shocks Mom With Pregnancy Announcement” – Sam and Nia surprise their mothers with a (literal) bun in the oven. Their oldest daughter, Symphony, learned from a scavenger hunt.
Sam, 29, tells PEOPLE the pair found out that Nia was pregnant with their third child just “a couple weeks ago,” and while they don’t know exactly how far along she is, they are “estimating eight weeks.”
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The Texas family’s popular YouTube series came into the spotlight after their August pregnancy announcement scored more than 15 million views. Just a few days later, however, the couple told fans that Nia had miscarried.
Sam and Nia previously told PEOPLE they would announce the big news just as early if Nia got pregnant again. Miscarriages, or the loss of a pregnancy before 20 weeks, happens in 15 percent of known pregnancies, according to the American College of Obstetricians and Gynecologists.
“We believe life begins at conception and we believe it’s to be celebrated right away,” Sam now tells PEOPLE. “We don’t believe it’s something to be hidden … we were excited right away and we wanted to share that with our fans.”
Sam says the new pregnancy doesn’t come without fears, however.
“There’s definitely some anxiety unlike we’ve ever experienced,” he says of trying for a child again after Nia’s miscarriage, “And [the miscarriage] caused just a crushing blow to our family … So, yeah there’s some anxiety thinking about the possibility of having another miscarriage.”
The couple’s first miscarriage announcement prompted fan speculation that the pair had been faking the pregnancy. A tumultuous month quickly followed. First, Sam admitted to signing up for an account through cheating website Ashley Madison and later, the pair were kicked out of Seattle’s Vlogger Fair after an altercation escalated between Sam and two other bloggers he felt were ridiculing how his family was mourning Nia’s miscarriage.
Regardless, Sam tells PEOPLE he isn’t bothered by dissenters.
The family is already preparing for a new baby around the house and big sis Symphony is “definitely excited,” he says.
“She’s already like this morning she was like ‘Mommy, I got to start helping you out more about the house,’ ” Sam told PEOPLE.