On tonight's episode of Sister Wives, Meri becomes upset after learning that all of Kody's other wives were present during Maddie's labor.

The synopsis for tonight's episodes reads, "Even as the wives bask in the glow of their first grandchild, tensions emerge. Meri found out that all the wives were at the birth, except her. Intense therapy sessions fail to resolve the hurt, so Christine confronts Meri with some brutal truths."

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In a preview for tonight, Janelle tells TLC's cameras, "I'm pretty worked up." Meri then angrily states, "I'm over this." Tensions run high, and it seems unlikely that things will pan out for these sister wives.

Meri moved out of Kody's compound in December, after which point he was left with his three partners Robyn, Christine, and Janelle. According to a recent article in Life & Style Magazine, Kody began courting a 25-year-old woman and mother of two after Meri left. He then proposed, but she said no. A source recently told the outlet, "He's heartbroken... He had his sights set on her as a sister wife replacement for his first wife Meri, but she turned him down."

The source added that the reason the woman may have said no is that Kody stopped visiting her as frequently when he became worried he would upset Robyn. "Kody told his friends that he was still sure it would work out," the source added to Life & Style Magazine. "... he showed his commitment by proposing to her."

Maddie Gave Birth to Her Son in May 2017.

Maddie Brown gave birth to her son, Axel James Brush, in May 2017. The birth made Kody and Janelle first-time grandparents. The couple told People after Axel's birth, "We’re feeling both excited and exhausted at the same time... We’re looking forward to having a family. Now that he’s here we excited to grow our family a little bit more and spread our love even more.”

Tonight, fans will also see Meri visit a gay bar with her daughter Mariah, and Mariah's girlfriend, Audrey. The trio visits the Unicorn bar, which Meri admits is a new experience. "It is a little bit awkward, I feel out of my element.... I feel too old to be here because, really, how many daughters drag their mom to the bar with them? Yeah, I feel like I'm too old to be here."

Be sure to tune into a new episode of Sister Wives airing tonight on TLC at 8pm ET/PT.