Fans are itching to find out if Robyn Brown is carrying baby number 18 for the Sister Wives family, but the big reveal on the reunion show could be even more shocking.

Robyn's Pregnancy Confirmed?

Kody Brown's first wife, Meri, has been hinting that she is unhappy with the family arrangement for some time, and now she could be gearing up for a reveal that she is leaving the family-meaning the status as Kody's only legal wife would be up for grabs.

Fans watched as she not only made plans to go back to college to be more independent this season, but also expressed how being the first wife sometimes makes her feel neglected-even though the family has had their arrangement since the 90s.

Meri Leaving The Family?

When the family packed up on a road trip to visit the Richard family-Meri shocked viewers by admitting she felt the same isolation that Natahanael Richard's first wife, Rebecca, felt.

"I'm happy on the good days and when Kody shows love and affection, but on a bad day, I question my importance to the family and if Kody still cares about me," she admitted during the penultimate episode.

Now, since the family teased that Robyn could be pregnant on the season finale episode on July 20, Meri has been potentially dropping subtle hints that she's unhappy and leaving the family on her Twitter page.

"Tell All episode with @tamronhall next Sunday. Don't forget to watch! Who knows what secrets may be revealed?" she tweeted during the finale episode.

Though the secret is believed to be that Robyn is pregnant, Meri has posted some cryptic messages on her social media account-including sharing a picture of one quote about the consequences of her decisions, and retweeting another about needing love, both on July 22.

"You are free to choose but you are not free from the consequence of your choice," the photo she posted read.

Her retweeted quote read: "We are born with a need to be loved, and we never outgrow it."

Find out what secrets and bombshells the Brown family may have in store for fans ahead of season 6 on the special Sister Wives Tell All episode, airing Sunday, July 27 at 9 p.m. on TLC.