Robyn Brown is Sister Wives star Kody Brown's latest wife, and here's why fans think that Robyn is preventing the reality star from adding more wives to his expansive family. It's no secret that Robyn is Kody's favorite wife of the four he has, so some of Sister Wives viewers suspect that Robyn wants to make sure she remains the apple of Kody's eye. As Kody seeks a new wife to replace Meri (whom the Sister Wives star regretted marrying in the first place), fans hypothesize that Robyn is sabotaging Kody's relationship with potential new wives.

Robyn is Kody's fourth wife and the only of the four that he did not get married to in the 1990s. After over 15 years with only three wives - Meri, Janelle, and Christine - Kody added Robyn to his family in 2010. In order to include Robyn in his massive family, Kody had to get legally divorced from his first wife, Meri. Although Kody and Meri haven't announced the end of their "spiritual union," the two have endured an unloving relationship for decades. While Robyn's incorporation into Kody's family might not have been responsible for the end of his love for Meri, there was a definite shift in attention toward Robyn and away from Meri. In fact, many fans agree that Kody's relationship with Robyn is unfair in the amount of attention Robyn receives in comparison to her fellow sister wives.

Related: Sister Wives: Why Janelle Brown Is Fans' Favorite Wife (& Why She's Not)

Basically, Robyn's entrance into Kody Brown's family meant that all of the other Sister Wives had to settle for less love and adoration from their husband. With Meri supposedly on her way out of her arrangement with Kody, fans claim that Robyn might be insecure that a new wife will sweep Kody away the same way she had. While only time will tell whether or not Robyn's alleged insecurities are founded, Kody has been public about his search for his next wife for the past few years. In 2018, Kody was courting a new wife to fill in following all of the low-points in his relationship with Meri. According to an anonymous source that spoke to In Touch, Kody had proposed to a divorced 25-year-old mother of two. Kody was sure that his new romantic interest was going to join his plural marriage, but she ended up rejecting the reality star.

Robyn Brown and Kody Brown from Sister Wives

Kody was left heartbroken after the 25-year-old turned down his marriage proposal. Alas, a fascinating detail about the failed courtship is Robyn's involvement in the 25-year-old turning Kody down. According to the inside source, Kody's romantic prospect said she didn't like how "controlling" Robyn is. The potential wife was talking about the rules Robyn had for what Kody and his wives could and couldn't do. Specifically, Kody was not able to spend too much time pursuing the 25-year-old woman as it would cause Robyn to get jealous. The woman explained that Robyn's strict supervision would not work out for her. Kody's relationship with his legal wife Robyn is clearly something his fourth wife wants to maintain. Based on his failed attempt to wed his 25-year-old potential partner, fans think Robyn is too threatened to allow another wife into their family.

Robyn is accustomed to being the center of Kody's universe, but the nature of polygamy requires sharing attention. While Kody might want to add another wife to his family following the ambiguous status of his marriage to Meri, Robyn is proving herself to be a major obstacle between Kody and a fifth wedding day. Kody is the patriarch in Sister Wives, but Robyn might just be the one calling the shots.

Next: Sister Wives: Why Reddit Believes Kody Has Poor Leadership Skills