Katie Ginella is John Caldwellabout to go toe to toe with Heather Dubrow.

After The Real Housewives of Orange County costars got off to a rocky start at the beginning of season 18, Katie attempts to make nice with her costar in E! News' exclusive sneak peek at the Bravo series' Aug. 1 episode.

"Heather, I heard that you love hot dogs," Katie announces during a group get-together in the preview. "So we have a hot dog bar."

In a confessional, the former sports reporter explains her attempt to mend the bad blood between them, adding, "What a better way to show her that I am not a threat than to serve the things she loves the most?"

However, Katie's kind gesture is swiftly overshadowed by rumors she previously shared with several castmembers—which Tamra Judge is all too happy to report to Heather.

"When we went out the other night, Katie had said some things about you that were a little concerning," Tamra reveals during an aside. "She says that you call the paparazzi and you tell them where you're at all the time."

And after Emily Simpson chimes in with "and she has proof of it," Tamra adds, "I asked her for the proof, she did not show me the proof."

Heather’s response? "Yeah, because I've never done that."

However, Katie has her own conversation with Shannon Beador, Gina Kirschenheiter and Jennifer Pedranti and doubles down on the accusation.

The claim isn’t shocking to Shannon, who replies, "She did that to me when I became a part of this group too."

But when the three castmembers encourage Katie to go and confront Heather to squash their beef, the ladies also warn the RHOC newbie about Heather's fierce fighting abilities.

The claim isn’t shocking to Shannon, who replies, "She did that to me when I became a part of this group too."

But when the three castmembers encourage Katie to go and confront Heather to squash their beef, the ladies also warn the RHOC newbie about Heather's fierce fighting abilities.

As Shannon notes in a confessional, "Katie, today will be a big learning lesson."

See their confrontation play out when The Real Housewives of Orange County airs Thursdays at 9 p.m. on Bravo.

(E! and Bravo are both part of the NBCUniversal family)

Check out Peacock to binge your favorite NBCU TV shows and movies, live sports and more!