It’s been a big year for Kody and Robyn Brown! Not only was Kody granted legal guardianship over Robyn’s three eldest children but the “Sister Wives” couple also announced in June that they were expecting their second baby together.

"We are so happy to announce an eagerly expected new member of the Brown family!" the TLC twosome told People magazine in June, revealing that Kody’s 18th child would be due on Jan. 7, 2016.

After the duo announced their big news, viewers began guessing whether Robyn would be having a little girl or boy. But the Browns, however, thought it might be possible that Kody’s fourth sister could be having both! During episode 6 of “Sister Wives,” Kody’s large family contemplated that perhaps Robyn would be having twins after she revealed her pregnancy “felt different” this time. The expecting mother explained in the Season 6 episode that she too thought she might be having twins after she began showing more quickly and became nauseous sooner than she did with her other four pregnancies.

However, when Robyn and the patriarch of the polygamist family paid a visit to their midwife, it was revealed that there was “just one” baby Brown growing in Robyn’s belly -- and in episode 9 of “Sister Wives,” fans of the hit TLC reality series will learn just whether that baby is a boy or a girl.

“Kody and Robyn will reveal their baby’s gender,” the synopsis for episode 9 says, adding that in addition to unveiling the anticipated announcement, the Browns will also pack their bags for a family vacation. Kody, his four wives (Meri, Janelle, Christine and Robyn) and his kids will say goodbye to Las Vegas' sweltering heat as they head to Alaska -- along with Logan’s new girlfriend! But the episode will take an emotional turn as Meri reveals her own, shocking announcement to the family, one that causes her to break down in tears.

"They have no idea how bad it is," viewers can hear Meri say in the trailer for the upcoming installment.

Do you think Robyn will have a boy or a girl? Sound off in the comments section below with your prediction and don’t forget to tune in to Season 6, episode 9 of “Sister Wives” when the exciting announcement is revealed on Sunday, Nov. 8, at 9 p.m. EST on TLC.