Fans speculated that she may be pregnant with Kody's next baby, but Sister Wives star Robyn may have truly denied all the rumors with a new photo on her Twitter account.

Meri Defends Her Marriage

Kody's fourth wife posted a photo of herself with Kody, fellow sister wife Christine, Christine and Kody's daughter Aspyn and others as they did a charity walk for Autism Speaks on November 8, and not only did she showcase a still-slim figure, but she also sported a new hair color.

"Walking this morning with the family for @autismspeaks down on the UNLV campus!" she tweeted along with the photo. The image featured Kody with his hair all pulled back into a ponytail, but the real surprising look is Robyn's.

Is Christine Jealous of Robyn?

Not only is her brunette hair lightened with new blonde highlights, but her blue sweatshirt and pants show that she is very clearly not carrying a child.

The rumors started near the end of season 5, as the topic of having another child in the family was brought up.Adding to the rumors, Kody tweeted a few separate hints, during both the season finale and the reunion episode, which seemed to hint that Robyn may be expecting the 18th child in the family.

During the reunion, the drama was amped up a bit as well, as the topic of Robyn potentially being pregnant was forbidden from being asked about, after Christine walked out of the room.

Sister Wives season 6 is scheduled to premiere in 2015, but a specific date has not been announced.

Tags: Sister Wives TLC Reality TV