"She has valid points" Y'all, no she does not😭! A. If she was there watching Jade & Teresse talk like she said she was, anybody with half a brain wouldn't mistake that for flirting. They're on equal footing them talking in any capacity shouldn't be an issue. Cordelia only started spouting bullcrap when Teresse mentioned that she knew Jade from him being her guard knight back in her Duchess Candidate days. This just triggered Cordelia, who is clearly insecure, into literally berating and gaslighting Teresse by taking advantage of Teresse's love and trust for Rina and twisting it into "advice" about Teresse being "reckless" and "endangering Rina" when if she knew ANYTHING about them like she seems to THINK she does, Rina is literally rooting for Jade & Teresse to become a couple.
Also, Cordelia talking about Teresse's family being poor as if Rina didn't used to work for them and was incredibly happy to be adopted by them because she was already close to Teresse. That's another reason why Cordelia is just not the girl that she, Cordelia, thinks she is! Besides, if i'm remembering correctly, Teresse's family was poor because they spent their money on anyone/thing, but themselves. Cordelia wants Teresse has so bad, but she can't because she's simply not that girl.
Finally, I'm going to need Teresse grow a damn backbone as well as a brain and the wherewithall(?) to tell a trusted companion about Cordelia because she's already been told that Cordelia and her little crew, essentially hates her guts! So of course, Cordelia doesn't actually give a damn about Teresse's "success" , she just wants her spot. And as someone else said, she's willing to make stuff up, just to get that spot!