Yin Zhu did not have any idea about what was going on between the two brothers, she was in a hurry to get to her sister who was with the healer. Given that the person who took her sister was Master Xun's right-hand man, she did not have much trust in that person.
The healer of the mansion stayed in the small cottage next to the manors of the three young masters, the young misses had another healer who lived next to their manors but knowing that Master Xun did not have good relationships with his sisters, she was certain that he wouldn't have sent his butler to the healer who lived in the cottage next to the three young miss even if it meant saving the extra round to the one who lived next to theirs.