We understand Arushi's concern for her sister. But I also feel that it is none of Arushi's business to announce K's problem to Saxenas. If K was there he would have objected to it certainly. Arushi's involvement is getting too far in Kriya's private matter. How far are CV's going to drag Arushi's involvement in her sisters private problem?
P is an educated woman. She can certainly look into the internet and find out about the treatments available and to decide what course of action she can take. Is Arushi going to decide the course of actions to take for them?
I wish that Arushi talk to her family about her problem openly and solve it before it gets too far instead of her interfering into her sister's personal matter.