“Days of Our Lives” viewers have watched some truly entertaining feuds between characters over the years.

However, like most soap opera couples, the pair have had many ups and downs over the years.

At one point when John and Marlena were separated, Kristen came to Salem and grabbed his attention.

Deidre Hall with Eileen Davidson.

However, there was a problem with the relationship.

Kristen was the adoptive daughter of John’s enemy, Stefano DiMera (Joseph Mascolo).

However, she worried that Marlena would get in the way of their happiness.

Eileen Davidson posing.

This led Kristen to help Stefano fake Marlena’s death.

After having Marlena kidnapped, she was hidden away in the secret room underneath the DiMera mansion.

Meanwhile, Kristen and John got engaged and happily began to plan their wedding.

Deidre Hall at an event.

With a wig and fake teeth, Susan looked just like Kristen.

Kristen and Stefano convinced Susan to step in for her doppelganger during doctor’s appointments and other baby-related events.

John and Marlena eventually got back together, leaving Kristen out in the cold.

However, her feud with Marlena was just getting started.

She devised a plan to seduce John’s son, Brady Black (Eric Martsolf).

However, when Brady decided to give Kristen a second chance, she took it.

The couple got engaged, but Marlena found the footage and played it at the couple’s wedding ceremony.

Kristen found herself obsessed with Brady and went to great lengths to get his attention.

After some time passed, Kristen returned to Salem disguised as Nicole.

She and Brady got intimate, resulting in a pregnancy.