EXCLUSIVE: Lisa Vanderpump Says Lisa Rinna Is 'as Welcome as a Poo in a Swimming Pool' on 'RHOBH' Mexico Trip

“I’ve given you so much of my time, my energy and my f**king heart, you b**ch!”

That line from Real Housewives of Beverly Hills newbie Eden Sassoon punctuates the new, explosive midseason trailer for the Bravo hit.

“All I can say is, wow,” Lisa Rinna told ET at the TommyxGigi Spring 2017 fashion show in Los Angeles. “She dropped it at me. Nobody else. It comes to me.”

“That’s a little further down the road,” Lisa Vanderpump added when ET caught up with her at OK Magazine’s Pre-GRAMMY Party in Los Angeles.

WATCH: Dorit Kemsley Promises Panty-Gate Is Gone for Good

“I should’ve used those words against Rinna myself,” Vanderpump joked. “It gets complicated, and Eden had no problem, really, as a newbie, kind of really voicing her opinion. I think she kind of inserted herself a little too vociferously, should we say, initially. And then, you see, that’s explained this week … these things have a habit of changing rather dramatically.”

Tuesday night’s episode picks up where last week left off, with Rinna arriving late to the all-cast trip in Mexico.

“Nobody got up,” Vanderpump noted. “She was as welcome as a poo in swimming pool.”

“We’re in the thick of it,” Rinna shared. “You’re gonna get so much drama. This is a really good season, I will say.”

WATCH: Eden Sassoon Calls Out Lisa Rinna as Biggest RHOBH Pot-Stirrer

A rare, tear-filled breakdown from Erika Giradi is also coming up this season.

“It’s all fair on Housewives,” Vanderpump said. “You do see her, two or three times, quite emotional. I think, you know, you can come into this show and keep your defenses up, but it chips away at you and then something will trigger it... no, I'm not telling you, because it's a complicated scenario, and it's like giving you the final pages of a book.”

Real Housewives of Beverly Hills airs Tuesdays at 9 p.m. ET on Bravo. Check out Erika’s preview of her tears in our chat below.