Viewers know Celebrity Big Brother housemate Megan had a problem with Lacey the second she stepped on the beach, as seen in Tuesday night's episode (9 February).
Arriving on the beach in episode four, Megan said on camera it's because Lacey had slept with Jordan in the past, apparently before Megan and Jordan had ever met, but that didn't stop her firing the insults at Lacey and saying: "When I saw that motherf**ker's face, I thought, f**k me, Jordan has been scraping the barrel. She's a four out of ten, mate."
But then she took to Instagram after the show to add: "Hey everyone. Just wanted to update you with the reason why I was angry with that blonde girl on Ex On The Beach.
"It was because she had been drinking vodka off my table in a club a few weeks before knowing full well she had slept with my then bf. Also an hour before I entered the villa, I was told off camera that she had been slagging me off before I had arrived.
"My tw*t of an ex also had lied to me about this as we both agreed to tell each other everything about our past before we entered the beach. But shock, that was another thing to add to the list of lies."
When one of Lacey's followers brought the post to her attention today, she replied: "Actually what Megan said in that is complete lies."
Megan hasn't responded yet.
Meanwhile, the feuding pair came face-to-face in Covent Garden yesterday as part of an EOTB press day. Megan sang a song and Lacey rather scathingly dropped a £50 note in front of her with the words, "I always donate to charity" scribbled across it.
Ex on the Beach continues Tuesday at 10pm on MTV.
Actually what Megan said in that is complete lies https://t.co/4xVrOFeasF— Lacey Fuller (@laceyfuller_) February 11, 2016