What will Mark Wright say?
If Lauren Goodger had married Mark as planned, then Jessica would have been her sister-in-law.
But something's caused these two to fall out - and now it's escalated on Twitter.
Jess has always been keen to fight Lauren's corner and, being close in age and having known each other for years, it's no wonder the TOWIE pair became closer friends during filming.

But something's gone horribly wrong in recent weeks, and not only are the Essex girls no longer talking to each other, they're now arguing in public via their Twitter feeds.
Lauren wrote: "Not seen the show yet, but actually shocked when u known some1 so long there that sly 2 lie n play victim! Life 2 short best of without them x.
"U can only try so much n be nice bigger person! Sometimes u got take step bk n look at the bigger picture n ignore n move on! They want drama!" (sic)
Oo-er. What's happened here then?
On Sunday's show, Jess opened up to sisters Sam and Billie Faiers about how she had been arguing with Lauren and no longer has time for the salon owner.
She was brought to tears as she tried to explain why she had fallen out with her friend - but stopped herself before she revealed too much on camera.
Darn it.

Lauren later tweeted: "Anyway more in life talk about!! So over it.. I am soo happy filming is over I need a nice break!! Looking forward goin away ahh excited united!" (sic)
To make sure it escalated into a right old Twitter spat, Jess responded with: "Haha still cannot belieeeve some people are that deluded to think they can twist and lie about something so much! Wow! Manipulative & weird." (sic)
Yikes.
If that wasn't enough, Mark and Jess' mum, Carol, decided to get in on the act and defend her brood, adding: "God some people really believe in themselves. Shame and devastated and got the evidence to prove it, one will unfold, moved on, thank God."
Lauren has always blamed Mark's family for ruining her relationship with Mark - but then again, she's accused a lot of people of a lot of things.
Given that she's not afraid to speak her mind, we doubt this is the last we've heard from Miss Goodger.
By Rebecca Martin
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