How about just providing that cite instead of ‘trust me bro’?
Would be much easier and more convincing
"DEADLINE: Going off that, how did you navigate Agatha’s queerness and telling that story?
SCHAEFFER: I’m so happy to say that it was such a natural process. There was no agenda. It landing on this character of Rio Vidal, who we created, we wanted to bring Death as a character into the show, but the creation of Rio was happening before we came up with the idea of Death. Prior to that, in our conversations about who this pursuant antagonist character would be, we liked the idea of the person being someone that Agatha had had a romantic relationship with. To use an appropriate term, in the room, it was very fluid. Man, woman, super powered, not, witch…it circled and it iterated until it really started to feel right that this dark, mysterious, powerful force that is Rio/Death came to the fore. Mary Livanos was instrumental in the characterization of Rio. Giovanna Sarquis, one of our writers, she came in with the idea of of her being Latinx, which just added this lovely dimension. So we did not start, like, at point A, Agatha is queer. That’s just where it went for us.
DEADLINE: Jen’s line about it making total sense that Agatha’s ex would be death made me chuckle. It does make total sense.
SCHAEFFER: That was legitimately from the room. It’s so fun when lines are essentially us talking, and that was 100% us talking and being like, ‘There’s nobody else.’ We couldn’t think of anybody else. We threw out names of other comic people and and no one felt like a big enough deal and sexy enough, because we also were so psyched on the idea that Agatha would be the one in the power position. So the idea that death is besotted, and Agatha is the one saying, ‘No,’ we just couldn’t get over.
It’s so fun and sexy and great, but also, it’s quite tragic, because the reason that Agatha is so isolated is the nature of her power. It means she has to kill all the witches around her. That’s very sad. It’s really, really tragic. She cannot fulfill her natural instinct to be tribal because of this power that she has. So what’s she gonna do? She’s gonna get with death, the only lady who’s gonna be excited by her career."
Agatha All Along showrunner Jac Schaeffer spoke with Deadline about the final two episodes of the Marvel series
deadline.com
Anything else is just you speculating, this shows that all of Agatha and Rio's interactions is because they are former lovers and was the intention from the writers.