Despite breaking up numerous times during their relationship, their love remains palpable in every scene they share.

Through the performers' acting prowess and unmistakable chemistry, Jack and Phyllis continue capturing fans' attention.

Few people on any soap have been able to survive the ordeals Jack and Phyllis faced.

Peter Bergman Michelle Stafford smiling

They’ve overcome adversity, and have remained friends.

Their marital bliss dissipated shortly after a bombshell reveal byDiane Jenkins(Susan Walters).

Ultimately, none of her efforts were enough to snuff the flames of Phack’s love.

Peter Bergman Michelle Stafford posing

A different indiscretion on Phyllis' part would ignite the spark that destroyed their first marriage.

How could Phyllis find herself in bed with the son of “the mustache?”

Phyllis' affair with Nick Newman (Joshua Morrow) had many ramifications.

Joshua Morrow Michelle Stafford smiling

However, her unintended pregnancy ruined her marriage to Jack.

In classic soap fashion, the affair sparked a “who’s the daddy?”

In a revelation that spelled doom for Jack and Phyllis' marriage, Nick was the father of Summer.

Peter Bergman Gina Tognoni smiling

The belief continued until a jaw-dropping reveal in 2013.

Nick wasn’t Summer’s father after all, Jack was.

The implications of this secret’s exposure would have dire consequences for Phyllis' life.

Jason Thompson Gina Tognoni smiling

Nobody would ever be the same again (viaSoaps In Depth).

With Phyllis in a coma, Jack spent a year believing Summer was his daughter (viaSoaps.com).

Instead, Jack was dealt another devastating blow after Sharon’s paternity test tampering was revealed.

Peter Bergman Michelle Stafford smiling

He wasn’t Summer’s father; Nick was.

The truth was out after a year of believing Summer to be his flesh and blood.

Sharon’s messiness got thwarted, and it seemed like Jack and Phyllis might have a fresh start.

Susan Walters smiling

Jack and Phyllis had already lost so much time, so he didn’t want to waste another minute.

Their next significant obstacle would come at the hands of the titan himself,Victor Newman.

However, thanks to Victor, their happiness didn’t even last a single night.

Marco destroyed many aspects of Jack’s life during his time in Genoa City.

However, the violation and betrayal brought forth onto Phyllis caused the most lasting damage.

Their mutual hatred for Victor gave birth to a flirtatious spark that ultimately caused them to betray Jack.

He attempted to overlook their connection, but they couldn’t stay away from each other.

The affair continued, effectively ending Phyllis' marriage to Jack and their friendship for quite some time.

While she claimed her emotions were genuine and no ulterior motive existed, Phyllis never trusted her.

During this heartbreaking period of Phyllis' life, she had Jack to lean on.

Still, their dynamic was complicated because he had recently professed his continued love for her (viaSoaps.com).

After decades of no communication from his oldest son Keemo, Jack learned the truth about his heartbreaking death.