After her screaming match with Audrina Patridge on last weeks The Hills premiere, Kristin Cavallari apparently wants to make nice - but Audrina isn't buying it.

In this clip of Tuesday's episode (see video, above), Audrina, 24, tells her sister Casey that Kristin, 22, sent her a text and "wants to go to lunch."

Audrina doesn't know what to think, considering Lauren Conrad once warned her that Kristin is a "man-eater."

She says she is still in the dark when Kristin and Justin Bobby hooked up. "Maybe they didn't," Audrina tells her sister.

But Audrina's certain there's a reason her ex is flirting with Kristin: "Justin's doing it to piss me off."

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For more, tune into The Hills, Tuesday at 10 p.m. (ET) on MTV.