Padmé had a hard time not laughing at this bizarre hunting ritual. This creature really was rather adorable, even fascinating. It was a shame that it hadn't been a meeting under some other circumstances. Still, Padmé's worry was temporarily primarily suspended under repeated mental mantras that everything was supposedly temporary when such things happened in the castle. Anakin should return, live and quite well, so long as the cat remained the same way.
She gave the cat enough slack with the robe sash that it shouldn't have had any problems then, after a few moments, gave the sash a gentle few tugs before wiggling what she could of the fabric. Just enough to give the cat a bit of playful "prey" resistance, not enough to rip the sash away.