"I don't know how he can say he didn't have any attraction to her," says Jessica More

It always seems to go down in the DMs.

In PEOPLE's exclusive sneak peek at part two of the Below Deck Mediterranean reunion, Jessica More accuses ex Rob Westergaard of sending fellow stewardess Aesha Scott a flirty message while they were still together.

When host Andy Cohen asks Westergaard if he would have pursued Scott had he met her first, the model says he and Scott always had a "brother-sister type" friendship.

"I didn't have that type of relationship with Aesha, anyway. It was more of a brother-sister type vibe where you could shoot the s---," he says. "I don't think so, no."

More, who dated Westergaard throughout the season, quickly chimed in.

Jessica More; Robert Westergaard; Aesha Scott
Credit: Karolina Wojtasik/Bravo (2); Greg Endries/Bravo

"I'm not going to go there, but there definitely was a [direct message] sent that wasn't brother-sister[like]," More says.

Scott, for her part, insists "there was never any, any attraction," adding, "100 percent. Never any attraction. No chemistry, nothing."

But More isn't buying it.

"It was just an extremely inappropriate DM from Rob to Aesha. So I don't know how he can say he didn't have any attraction to her," she says. "The one asking if you took a big c--- lately and if you liked it."

More and Westergaard's relationship proved to be a tumultuous one, and they often fought over issues stemming from jealousy — especially after Scott joined the crew. In one episode, More found herself upset with Scott after she grabbed Westergaard's hind area while posing for a group photo.

Though the two split after the show, Westergaard recently appeared on an episode of Watch What Happens Live with Andy Cohen, where he said he still has "a lot of love for Jessica."

Part two of the Below Deck Mediterranean reunion airs Monday at 9 p.m. ET on Bravo.