In a preview from Wednesday night's episode of the ITVBe show, we see Lydia and Arg meeting up with Tommy Mallet and Georgia Kousoulou at a club.
Tommy says he thinks there is still a "spark" between Lydia ad Arg, which prompts Arg to suggest Lydia is still flirtatious with him despite them no longer being together.
Lydia's left feeling rather offended.
Lydia and Arg's on-off romance has played out on TOWIE screens over the years, with viewers watching every up and down.
There was tension between them earlier this series when Lydia decided Arg was spending too much time with her mum Debbie Douglas. They mutually agreed they needed to step back from each other's lives to allow each other to move on.
Lydia has now revealed she's in the early stages of dating someone else – and on Sunday night's episode, we saw Arg saying he wasn't bothered.
He said: "As far as I'm fully aware, she's seeing someone. She isn't a single girl. How do I feel about it? Absolutely sweet. I'm used to Lydia going on dates and seeing new boys, having new boyfriends. Who does she always come back to? If me and Lydia are to be, we'll be. I ain't worried about no geezers 'cause they aren't going to be me, are they?!"
TOWIE airs tonight at 10pm on ITVBe.
Take a look at Arg's transformation from then until now: