Judging from these photos, it looks a rather tense conversation, and Lydia appears to walk off at the end, leaving Arg standing alone by the ocean.
The on-off couple broke up earlier this year but the separation only became public knowledge in May, when Lydia told ITV's Lorraine: "Me and James actually broke up nearly seven weeks ago, which was a tough decision to make but I kind of felt I didn't really have a choice."
It came as a shock to fans as the last time we saw Lydia and Arg on screen, at the end of TOWIE's 17th series, they had been discussing buying a property together.
Neither Lydia nor Arg has revealed the exact reasons for their split, but both have been moving on in their own ways: Lydia went travelling across Indonesia, while Arg has been attending multiple boot camps and embracing a new, healthy lifestyle.
Lydia recently admitted it hadn't been the "best of break ups" and she was a bit tentative about bumping into Arg during filming.
She previously said in a video posted to the TOWIE official website: "James is at boot camp at the moment. I don't know how long he's staying there but I think it's a while as he wants to lose a lot of weight. That suits me very well at the moment because I don't have to bump into him. I know he will be coming back to Essex at some point."
Lydia and Arg hadn't been in touch prior to filming in Palma, with Arg saying: "I haven't had any contact with Lydia at all. I've just been so so busy cracking on and focusing on myself. I'm doing extremely well and having a whale of a time. I'm in the zone. Life is good at the moment. I'm happy and I feel like I'm a good person to be around."
Lydia has also said she's feeling "happier than ever" following the split, adding her travels had made her a "stronger" person.
TOWIE returns to ITVBe this month.