Conduct a controlled test

Madelyne burst into the house, shouting in excitement, "CATHERINE! COME TO THE LIVING ROOM!"

"RIGHT WITH YOU, MISTRESS!" The voice came from the game room. Perhaps Catty was streaming--but no matter, excuses could be made later. Her fans were obsessive enough already.

Maddy dropped her satchel behind the couch and stood with her hands on the back of it. Catty bounded into the room, gracefully leaping over the back of the opposite chair and landing in it with a mostly human pose. Her tail and ears perked up and gave hint to her curiosity, and her claws were poking out just a bit. In short, she wasn't as calm as she tried to look.

"My dearest Catty, we may have a wonderful new toy. But I fear it is untested, and I do not wish to lose what comfort we have gained. You may refuse this request, if you wish, but I cannot explain in advance without ruining the test."

"Misssssstress," she hissed, playfully showing a bit of sincere annoyance, "You doubt my trust in you? After our many sacrifices?"

"I do not. This is a weighty issue, and formality is called for. May I proceed?"

"Of courrrrrrrse," purred the catgirl. She relaxed her posture, ears and all. "Proceed."

Maddy pulled the Trans Note from the hidden pouch in her own torso and expertly flipped to the current incomplete page. She engaged her multi-thread brain modification and placed all five of her graphite fingernails on the page of the Note.

With five digits writing independently, the command was written in a fraction of a second: "Catherine Doe loses her cross-stimulation nerve instantly."

Maddy tossed the Note to Catty so that she could read the line.

"Maddy, you know how tough that makes it. What the hell does that test?"

But Maddy had already made her next move.