Proud, 29, didn't mince her words as she branded MAFS' participants Jessika Power and Martha Kalifatidis "sl***y b**ches" in an interview with the Daily Telegraph.
Proud's scathing comments are undoubtedly in reference to blonde bombshell Jessika's numerous on-screen indiscretions.
Despite her marriage to Queensland farmer Mick Gould, the office administrator instigated flirtations with many of their co-stars before embarking on an adulterous affair with intruder groom Dan Webb (which seems to be going strong to this day).
WATCH: MAFS' Jess and Dan caught in the act!
Speaking about Jess' promiscuity, the MKR star remarked: "No one wants to buy the cow if you're getting the milk for free."
Both Proud and Power hail from Western Australia and the culinary whizz had no qualms about declaring that Jessika's behaviour makes "Perth girls look desperate".
Proud's tirade continued with harsh criticism of Kardashian lookalike Martha Kalifatidis who she blasted for encouraging Jessika's pursuit of married men.
In what was perhaps her most vicious comment about the MAFS duo, Proud declared she would "never be insecure enough" to marry a stranger on television.