The former friends exchange harsh words in a bar after confronting each other over their recent disagreement.
In recent episodes, viewers have seen Grace fall out with close friends Georgia Kousoulou and Fran, after it was revealed that she was still in contact with her ex-boyfriend, despite going out on a few dates with Tom Pearce.
When Grace came face-to-face with Fran and Georgia, the trio fell out, with Grace questioning their loyalty, saying she felt they weren't being supportive of her.
In the last episode (13 July), Grace told her former love interest Lewis Bloor: "Fran can sometimes pull the wool over people's eyes a little bit, she seems like she's really sweet but sometimes she can turn. And when it comes to Georgia, she can be a bit of a sheep."
Tonight (16 July), despite Grace and Fran trying to avoid each other, they finally come to blows at the Essex Polo after party, with Grace sharing a few home truths about Fran.
Sneak peek pictures show things get pretty heated, with Fran pointing in Grace's face.
Is this the end of their friendship? Or will Grace and Fran be able to put their differences aside? Tune in tonight to find out.
The Only Way Is Essex continues tonight (Wednesday 16 July) at 10pm on ITV2.
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