Katie Conrad's journey on Married At First Sight was full of shocking moments that received mixed reactions from audiences. Katie's relationship with Derek Sherman was full of fights, accusations, and ultimately, infidelity.

While some viewers were sympathetic to Katie's point of view, the Married At First Sight fanbase is largely united in their distaste for the mental health professional. From their arguments as a married couple to the decisions Katie made outside of her relationship with Derek, here are Katie's most controversial moments.

Related: Married At First Sight: Why Chris Williams Feels Pestered By Critics

Katie Admits To Cheating On Derek

Married At First Sight Derek Katie

The news of Katie's infidelity is less controversial than it is generally distressing for the viewers invested in Katie and Derek's uphill battle toward a happy marriage. Even for the most generous audiences, the assertion that Katie cheated on Derek more than once is difficult to not find disturbing. On the season 1o reunion, Derek revealed the couple was not going to stay married because Katie had cheated on him with her ex. Derek even claimed Katie had an affair the day after their honeymoon. While some fans could argue that Katie was not receiving the love she desired from Derek, cheating on her newlywed husband is a new low for the Married At First Sight series. The additional revelation that Katie proposed she and Derek just be friends two weeks after their marriage supports fans' belief that Katie was never dedicated to marrying Derek.

Katie Shuts Down Derek's Dreams

Katie Conrad Married At First Sight 2 cropped wearing earrings

Katie and Derek spent a great deal of their time on Married At First Sight arguing about the practicality of Derek's ambitions. On top of his full-time job as a cybersecurity engineer, Derek had several dreams Katie described as "childish goals and ambitions." From writing a book to building a giant treehouse, Derek did have grandiose goals that would take exorbitant effort to achieve. Some fans might argue Katie's concerns are valid, as she is looking out for Derek and his ability to take care of his family. On the other hand, Katie was unnecessarily aggressive when telling Derek he is unqualified to dream big. While she may have meant to be constructive with her criticism, Katie demonstrated herself to be an unsupportive spouse to Derek in this argument.

Katie Overreacts To Derek Having Fun With Friends

During a couples' retreat, Katie initiated an explosive fight with Derek after he took part in the groups' fun. As a result of Derek laughing with other Married At First Sight cast members, Katie abruptly stormed out in anger. Although Katie's actions toward Derek are immature, her frustration has merit. Katie wanted her husband to make her feel special, especially after Derek admitted he was not in love with her. After sharing that Derek had not initiated physical contact between the two, viewers understood Katie's insecurity. Unfortunately, her quickness to anger in response to Derek having fun with friends is a hard pill for Katie-supporters to swallow.

Katie Goes On A Date With Zach

Despite the wide array of shocking behaviors Katie displayed during her journey on Married At First Sight, the most surprising revelation was her date with fellow cast member Zach Justice. Zach was on the reality series with his ex-wife, Mindy Shiben. On the season 10 finale, however, it was revealed that Katie and Zach went on a date. Katie and Zach framed the get-together as a casual catch-up after an emotional season, but their co-stars took the outing more seriously. After allegations of cheating on Derek and arguing with him over simply getting along with fellow Married At First Sight cast members, it was a bold and unpopular move for Katie to grab drinks with Zach.

Next: Married at First Sight: Paige Thanks Mom for Being Her Biggest Supporter