Flip or Flop star Christina El Moussa's new romance is already marred with cheating rumours. Just days after the house remodelling queen was spotted on a romantic date with her new man Doug Spedding his ex Tracy Johnson-Diaz spilt the tea on their secret affair.

Warning the 33-year-old TV star about her new boyfriend, Tracy made some explosive claims to the Star magazine. Apparently, both of them were still hooking up even when Doug was dating the newly single Christina.

However, the claims have not been independently verified by IBTimes UK.

"Doug and I had sex in my home [after he started dating Christina]," Tracy allegedly told the magazine. "I'm speaking out because she needs to know what this guy is like!"

According to reports, the Orange County businessman had been in an on again, off again relationship with Tracy for five years. However, their romance seems to have fizzled out this spring, around the same time when rumours of his new romance with Christina started doing the rounds, per Tracy.

Dishing further details about their recent rendezvous, Doug's former girlfriend revealed that they caught up after she returned from a holiday in Florida earlier this month. However, things reportedly got steamy between the former lovers.

"We started kissing, then we made love," Tracy claimed before warning Christina about her new man's suspicious streaks. "He can be possessive and a control freak. He'd cycle over to place at all hours and I'd see him peering through windows, spying on me to see if I had anyone else over," she added.

The HGTV star, who split from her husband Tarek El Moussa in January, recently enjoyed a boat ride with Doug sparking chatter about a new romance. While the pair is said to have known each other for nearly a decade, the two reconnected after Christina's breakup from Tarek.

"It's new. They've been talking and seeing each other for a couple of weeks," a source told ET Online. "She dated him before her and [ex] Tarek were together."