Margaret felt the presence and decided that, yes, it was definitely time to leave. 

"you two have fun on your hunt." she muttered as she opened Descorrer once again and stepped inside. "I, on the other hand, am returning home." 

And with that, this time without waiting for the other two arrancars, she returned to the human world. However, inside Descorrer she adjusted her reiatsu to the point where she could easily be disguised as one of the many inhabitants of this town. 

Reappearing in an alley, Margaret sighed and entered her home through the flower shop's back door.