"Your's?" Mami wasn't expecting Tohsaka to be so possessive of her, stating that Mami belonged to Rin now. But where some other girls might have a problem with being thought of belonging to someone, Mami found she had no real issues with it. She wanted something in her life to ground her, to feel like she wasn't alone in the world, and Rin was practically offering that to her. So she nodded a few times, even lifting her back up off the ground just a little so Rin could reach behind her, unhooking her bra.

Her breasts seemingly broke free as her bra was snapped off, and moved out of the way by Mami's own hands, figuring that Rin was intent on seeing her chest. "You seem really interested in my breasts.."