The cast went all out with their costumes at the Mythical Creatures-themed party in an old house in Essex, with Fran sassing things up in a teeny 'fallen angel' costume.
Arriving arm in arm with Diags, it looked like the couple were trying to put their recent drama behind them. On Wednesday's episode, Fran discovered naked pictures of another girl on Diags' phone.
Despite an explosive argument, it seemed like the pair were going to work through their problems with Fran telling fans on Twitter that she still "loves my James".
But at the Halloween party, which is set to feature on Sunday night's show, it looks like Diags and Fran exchange heated words.
The pair are pictured looking pretty tense as they clutch a glass of drink in their hands.
And while things looked frosty between Fran and Diags, there seemed to be another altercation between Diags and Lewis Bloor.
As viewers have recently seen, Fran and Lewis have been embroiled in a bitter feud, and last week Diags stepped in to defend his girl after Lewis branded Fran a "pug" in a war of words on Twitter.
While it's unclear what they seem to be arguing about, Lewis - who decided not to embrace the fancy dress theme - is pictured standing face-to-face with Diags, who seeks him out.
One thing's for sure, this party seems to be far from smooth sailing....
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