Stage 2 of the audition is the facesitting test.

If the pathetic male wants to be Mistress's slave then he must take merciless, prolonged ass smother. The only air he's allow is between Mistress's big ass cheeks. "I want you to breath my ass slave"

"I want to see how long you can take this big ass for."

As the slave get tired he tries to sneak a breath, every time he does Mistress grabs his cock and pushes it back. At one point she pushes his cock right back and holds it for 30 seconds while sitting on his face, this stops him from trying to turn his head.