Issues have been plaguing the relationship between wrestling superstars John Cena and Nikki Bella from the start, new details reveal.

Where Did It All Go Wrong

The wrestling superstars, who were together for six years total, were set to tie the knot on May 5. Earlier this week, they shocked the public by confirming that the wedding is off.

Fans have been scrambling to understand what went wrong with the outwardly happy couple, considering Cena proposed in front of the entire WWE Universe at Wrestlemania 33 last year.

It seems like the couple had communication problems. It took Bella two years to tell Cena she has been married before. The revelation was a key plot point on the second season of Total Divas.

A Binding Agreement

Bella was already living with Cena at the time, after signing a 75-page cohabitation agreement, which bound her to his house rules. This contract details how Bella must move everything out of the house as soon as possible if the two separate.

The prenup-style document was Cena's attempt at securing his home in the event that something goes wrong with their relationship. He reportedly felt bad about it but it didn't stop him from going back on the contract.

The contract, most alarmingly, described Bella as a guest in the home. Cena supports his family members financially, which may explain his stringent rules.

Keeping A Secret

In an emotional moment on the hit reality show, Total Divas, in 2014, Bella told her family about her first marriage, shocking them with the story of how she decided to get hitched without notifying anybody.

"I got married when I was 20. And got divorced at 23, to my high school sweetheart. Even when I started walking down the aisle, I knew this was a huge mistake and how can I get out of it and I couldn't," she said.

She noted at the time that Cena didn't know. Bella was worried since she and her then-boyfriend were discussing getting married someday, and that it would change his opinion of her.

At the time, Bella's brother JJ Garcia was concerned about Cena's reaction. It was also him who ultimately spilled the beans to the WWE Superstar.

Bella eventually told Cena about it. The Blockers star, having gone through a divorce himself, was forgiving. He even encouraged Bella to be more open with him in future.

"When the focus of most of our problems has to do with that particular topic, maybe I should know that stuff," he told her, referencing how the two had been arguing about getting married.

Bella subsequently told viewers that she realized she needed to have more confidence in her relationship with Cena.

A Pity Engagement

The two called off their engagement almost a year to the day since the big Wrestlemania proposal. An insider revealed to PEOPLE that it was Bella who broke things off, due to Cena's behavior as the big day got closer.

"John acted more and more like he was doing her a favor by somehow conceding to go ahead and marry her. [She] doesn't need a pity proposal, a pity wedding, a pity husband," the source claimed.