They've finally acknowledged Robyn's pregnancy on their hit show Sister Wives, and now, the Brown family is addressing whether or not the family's 18th child will be a boy or a girl on social media.

Meri & Robyn Both Make Big Announcements

Since revealing the news that Robyn was pregnant earlier this year, the family hasn't addressed specifics about the pregnancy besides a few updates on the baby's growth and Robyn's pregnancy symptoms. However, after Robyn broke the news to the rest of the family on the Oct. 18 show, speculation began on social media about whether Robyn was expecting a boy or a girl-or even twins.

The family seems to be very excited about the news-with Kody's first (and formerly only legal wife) Meri taking to Twitter to float the possibility that Robyn was actually expecting twins-and expressing disappointment that she is only pregnant with one baby.

Meri Slams Rumors Robyn Was Involved In Catfishing Scandal

"Can I say I'm just a little disappointed that it's not twins?" she wrote during the episode. Kody also took to Twitter to discuss the newest child, and discussed how several of the other kids were also convinced she was going to have twins.

"Could it be twins? Many of the kids think so. Let's see..." he wrote.

He also speculated on the possibility of whether or not the baby was a boy or a girl-revealing he has an idea of whether or not he is going to welcome another son or a daughter, but refusing to make a bet on the odds.

"Let's bet on the baby's gender...NOT...50/50...no odds on that bet. Let's wait for ultrasound to know. But, I got a hunch," he wrote.

Of his 17 older kids, Kody is the biological father of 14 of them. He has seven sons-Logan, Hunter, Garrison, Gabriel, Paedon and Solomon with Janelle, Christine and Robyn, and nine daughters-Aspyn, Madison, Mykelti, Savanah, Gwendlyn, Ysabel, Truly and Mariah with them and Meri.

Sister Wives airs Sundays at 9 p.m. on TLC.

Tags: Sister Wives TLC Reality TV