MARRIED At First Sight fans have branded Martha Kalifatidis the "biggest snake in Australia" after last night's mind-blowing episode.
It saw the 32-year-old star unleash hell at a cosy dinner party by urging Jessika Power to make a move on another girl's husband.
Viewers were open-mouthed in horror as stunning Jess slid over to Nic Jovanovic and purred that she was "sexually attracted" to him.
A day earlier, Martha had claimed that Nic rubbed Jessika's leg suggestively under the table during a dinner party.
That sparked an almighty row between her and hot-headed Cyrell Paule that saw a plate fly across the room.
But undeterred, Martha seemed hell-bent on stirring up more trouble.
Jess fretted: "I think Cyrell and Nic are getting along and I don't think I should really tell him anything."
But Martha insisted: "I feel you should act on that. If I saw something in another man that I like, I can't help it, I'd act on that, 100 per cent.
"If you feel something wife Nic, a vibe. I'm big on vibes."
Spurred into action, Jess then grabbed Nic and made her move - only to find herself politely but firmly rebuffed.
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He told her: "I don't even know what to say. Look, I'm not going to lie, Cyrell and I have a lot of arguments but there is nothing I would do to jeopardise my marriage.
"I don't want to do this - I don't want to be talking like this. I'm married and I don't even think we should be having this conversation."
One viewer fumed: "Just when you though Ines and Sam were the villains, up step Jess and Martha. No girl code. No morals. No respect."
Another wrote: "Martha and Jess are such snakes... good on Nic for keeping his integrity."
A third agreed, posting a picture of the pair writing: "Australia’s two most venomous snakes."