Chelsia is just a miserable human being, she joked about Amanda's father's suicide on at least two occasions. Even if Amanda wasn't around, there's nothing funny about something that horrible. LOL at her calling Nat a slut, at least she doesn't sleep with men for money unlike her bed buddy James.
I'd love to see the look on her face when she finds out that James is a gay porn star. It seems like James doesn't want her in the house, I don't but his "I don't want us to have to turn against each other" excuse either.