Last night (9 October), Ferne was shown crying - on several occasions - after her ex-boyfriend Charlie got close to Jasmin Walia.
In one heated phone call while standing on the Vegas Strip, she sobbed to Charlie: "Don't..you..dare...go...out...with...her!"
Before hanging up, Charlie insisted: "I don't understand what I'm doing wrong at the moment. I'm single."
Ferne later confronted Charlie in a night club and told him: "I should've moved on and forgotten about you, but I still want you and it's not fair. You made this choice - I didn't."
Charlie then admitted to sleeping with 20 women since their split, which was sparked by Charlie cheating on Ferne in Ibiza during the summer.
After watching the episode back with her pal Sam Faiers, Ferne took to Twitter to have another pop at her ex-boyfriend.
"I've never heard so many lies...he turned up to my work, home, with flowers asking if I'd take him back and turned up at my room in Vegas!" Ferne ranted.
"What goes around comes around...thanku so much for all your support it's been overwhelming. Can't love and thanku enough #girlpower."
Charlie, however, was also quick to give his side of the story on the social networking site.
He blasted: "Tweet what you think are the facts, I'll save the REAL TRUTH until the time is right .. One thing I don't do is lie. #GetsYouNowhere."
Check out some of the cast's Vegas holiday pictures in our gallery:
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