Guys, after watching yesterday's episode...am sure that Arti somehow knows who is the cause of the problem but is not ready to share it with even her Yashji. I think the best way to tackle the situation is to borrow the expression of the culprit...i.e 'calm, composed, sweetness with smile' and attack. If you don't believe me..please rewatch the scene carefully (dialogue , voice and expression ) and judge for yourself. For Arti...yesterday she might not have cemented her doubt but is definately increased in that direction after the milk fiasco and Ishita not moving out of the room till Arti reminded her to leave and worry about Aakaash.
Your comment please. Thanks and Good day !😊