Sister wives
Kody Brown with sister wives, Robyn, Christine, Meri and Janelle.TLC

Sister Wives stars Kody and his fourth wife Robyn Brown recently announced that they are expecting their second child.

Several fans have expressed disappointment with the news and blamed Robyn for trying to have Kody all to herself. Some fans also took a dig at Kody's preference for Robyn while neglecting his other wives, Meri, Christine and Janelle.

One Facebook user Kerri McQuaid Burrows wrote: "Feel bad for Meri... Think Robyn has come into the family and turned it inside out! It is always all about Robyn, her kids, how she feels! Think she should go!"

"Meri is the best robyn go away," said another user.

Another Facebook user Carmen R Aponte, commented, "Robyn is breaking this family apart .i use to love this show but it's getting stupid ..feel bad for meri n janelle."

Terese Simpkins wrote, "Robyn is the reason I quit watching."

Meanwhile, Meri Brown took to Twitter to share a few positive vibes quotes after Robyn's baby announcement.

The polygamous family told People: "We are so happy to announce an eagerly expected new member of the Brown family!"

The baby is due on 7 January and will be the 18th child in the Brown family, which includes Robyn and her three children from a previous marriage, apart from Kody's three other wives and their offspring.