Humiliate her first.

"Tatsuki, get on all fours and crawl over to me," Chizuru ordered her. She decided she was going to make Tatsuki squirm for now. Having her embrace her new life could always be done later.

Tatsuki closed her eyes and grit her teeth as she fell to her hands and knees, and crawled over to Chizuru, who removed her shoes and socks, before holding a foot out to Tatsuki. "Worship your Mistress's feet with your hands and mouth," she commanded.

"Yes... Mistress..." Tatsuki groaned, reaching for the foot, and massaging it, before her tongue lolled out and she ran it over Chizuru's toes. Tatsuki tightly shut her eyes as she tried to shut out the world and what she was doing, even as she started sucking on one of Chizuru's toes.

(Not into foot stuff by itself generally, but as a tool for demonstrating submission, then it becomes enjoyable, at least to me, lol.)

Chizuru grinned as she let Tatsuki work, before turning to Orihime. "How about ordering us a couple pizzas? Take one of Tatsuki's debit cards to pay for it."

"Okay Chizuru!" Orihime said enthusiastically as Tatsuki whimpered at the idea of her money being used by Chizuru. Chizuru then swapped feet, and Tatsuki continued to dutifully worship it.

"Alright, that's enough of that particular action, now get into a position I can use you as a foot rest," Chizuru told Tatsuki.

"Yes Mistress," she sighed, turning her body so Chizuru could lay her feet on her back.

"What's the pin on the card?" Orihime asked, ordering the pizzas online.

After Chizuru made Tatsuki tell Orihime the card pin, she said, "Now, I want you to say the phrase, "I am a dumb slut," over and over," Chizuru told Tatsuki.

"I am a dumb slut... I am a dumb slut... I am a dumb slut..." Tatsuki said repeatedly, it becoming a mantra now.