Marriage Boot Camp Exclusive Preview: Watch What Happens When Heidi Montag Gets "Triggered To Mean Girl Status"

Heidi Montag told us that she and Aviva Drescher didn't quite get along in the Marriage Boot Camp: Reality Stars house, but it seems like tonight's episode will show her instead feuding with Rachel, who's been dating Survivor's Tyson for six years and still hasn't gotten a ring.

OK! Exclusive: Heidi Montag Reveals She Wants As Many Kids As The Duggars

As part of this episode's exercise, Jim and Elizabeth bring a wedding dress to the house for Rachel to wear, but Heidi decides to try it on instead—which of course fits her perfectly. After some mean comments Rachel made about Heidi last week, this is Heidi's revenge! Watch above as Heidi gets "triggered into mean girl status" and to find out which other housemate is in on the joke with Heidi.

WATCH: Aviva Drescher On Leaving RHONY and Reality TV

And tune into Marriage Boot Camp tonight at 9pm on We TV! Do you think Heidi was trying to be mean or just joking? How do you think Rachel will react when she sees Heidi in her dress? Tweet us @OKMagazine.