Firstly, Shadow and Simba haven't been master and pet for the best part of a year. Simba is in a relationship with the guy he lives with, who is just some random nobody. In the archive linked, Shadow is covering for a guy called Alamikos, who is also called "Shadow's Cat".
Simba has a thing for being dombroken. Which basically means he just pretends to be a top to get crushed by a real dom.
The best thing about the truth is it's really quick and easy to prove. He even has the right icon unlike what was shown by the others. And he actually types like Simba. Who'd have thought if you were going to create alts to impersonate someone, you'd have to pay attention to that sort of shit. Here:
https://pasteboard.co/I0gK3B2.png (I have more of this, but this is enough to prove the point. Simba goes on to pay 100, which isn't close to the amount the other guy wanted. It isn't clear whether the other guy sends the blackmail information anywhere in the end.)
https://pasteboard.co/I0gM2yD.png (Submitting to a fox. The shame. Definitely not an alpha dom.)
That's not how burden of proof works. If you're going to claim something, the onus is on you to prove it. If you don't have any proof, then fuck off.